aarch64: add -fno-stack-protector to tests

These tests fail when the testsuite is executed with -fstack-protector-strong.
To avoid this, this patch adds -fno-stack-protector to dg-options.

The list of FAILs is appended.  As you can see, it's mostly about
scan-assembler-* which are sort of expected to fail with the stack
protector on.

FAIL: gcc.target/aarch64/ldp_stp_unaligned_2.c scan-assembler-not mov\\tx[0-9]+, sp
FAIL: gcc.target/aarch64/shadow_call_stack_5.c scan-assembler-times stp\\\\tx29, x30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/shadow_call_stack_5.c scan-assembler ldr\\\\tx29, \\\\[sp\\\\]
FAIL: gcc.target/aarch64/shadow_call_stack_6.c scan-assembler-times str\\\\tx30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/shadow_call_stack_7.c scan-assembler-times stp\\\\tx19, x30, \\\\[sp, -[0-9]+\\\\]! 1
FAIL: gcc.target/aarch64/shadow_call_stack_7.c scan-assembler ldr\\\\tx19, \\\\[sp\\\\], [0-9]+
FAIL: gcc.target/aarch64/shadow_call_stack_8.c scan-assembler-times stp\\\\tx19, x20, \\\\[sp, -[0-9]+\\\\]! 1
FAIL: gcc.target/aarch64/shadow_call_stack_8.c scan-assembler ldp\\\\tx19, x20, \\\\[sp\\\\], [0-9]+
FAIL: gcc.target/aarch64/stack-check-12.c scan-assembler-times str\\\\txzr,  2
FAIL: gcc.target/aarch64/stack-check-prologue-11.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-12.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-13.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-13.c scan-assembler-times str\\\\s+x30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-14.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-14.c scan-assembler-times str\\\\s+x30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-15.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-15.c scan-assembler-times str\\\\s+x30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-17.c check-function-bodies test1
FAIL: gcc.target/aarch64/stack-check-prologue-17.c check-function-bodies test2
FAIL: gcc.target/aarch64/stack-check-prologue-18.c check-function-bodies test1
FAIL: gcc.target/aarch64/stack-check-prologue-18.c check-function-bodies test2
FAIL: gcc.target/aarch64/stack-check-prologue-18.c check-function-bodies test3
FAIL: gcc.target/aarch64/stack-check-prologue-19.c check-function-bodies test1
FAIL: gcc.target/aarch64/stack-check-prologue-19.c check-function-bodies test2
FAIL: gcc.target/aarch64/stack-check-prologue-19.c check-function-bodies test3
FAIL: gcc.target/aarch64/stack-check-prologue-2.c scan-assembler-times str\\\\s+xzr, 0
FAIL: gcc.target/aarch64/stack-check-prologue-5.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-6.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/stack-check-prologue-8.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 2
FAIL: gcc.target/aarch64/stack-check-prologue-9.c scan-assembler-times str\\\\s+xzr, \\\\[sp, 1024\\\\] 1
FAIL: gcc.target/aarch64/test_frame_1.c scan-assembler-times str\\tx30, \\\\[sp, -[0-9]+\\\\]! 2
FAIL: gcc.target/aarch64/test_frame_10.c scan-assembler-times stp\\tx19, x30, \\\\[sp, [0-9]+\\\\] 1
FAIL: gcc.target/aarch64/test_frame_10.c scan-assembler ldp\\tx19, x30, \\\\[sp, [0-9]+\\\\]
FAIL: gcc.target/aarch64/test_frame_11.c scan-assembler-times stp\\tx29, x30, \\\\[sp, -[0-9]+\\\\]! 2
FAIL: gcc.target/aarch64/test_frame_13.c scan-assembler-times stp\\tx29, x30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/test_frame_15.c scan-assembler-times stp\\tx29, x30, \\\\[sp, [0-9]+\\\\] 1
FAIL: gcc.target/aarch64/test_frame_2.c scan-assembler-times stp\\tx19, x30, \\\\[sp, -[0-9]+\\\\]! 1
FAIL: gcc.target/aarch64/test_frame_2.c scan-assembler ldp\\tx19, x30, \\\\[sp\\\\], [0-9]+
FAIL: gcc.target/aarch64/test_frame_4.c scan-assembler-times stp\\tx19, x30, \\\\[sp, -[0-9]+\\\\]! 1
FAIL: gcc.target/aarch64/test_frame_4.c scan-assembler ldp\\tx19, x30, \\\\[sp\\\\], [0-9]+
FAIL: gcc.target/aarch64/test_frame_6.c scan-assembler-times str\\tx30, \\\\[sp\\\\] 1
FAIL: gcc.target/aarch64/test_frame_7.c scan-assembler-times stp\\tx19, x30, \\\\[sp] 1
FAIL: gcc.target/aarch64/test_frame_8.c scan-assembler-times str\\tx30, \\\\[sp, [0-9]+\\\\] 1
FAIL: gcc.target/aarch64/test_frame_8.c scan-assembler ldr\\tx30, \\\\[sp, [0-9]+\\\\]
FAIL: gcc.target/aarch64/sve/struct_vect_24.c scan-assembler-times cmp\\\\s+x[0-9]+, 61440 4
FAIL: gcc.target/aarch64/sve/struct_vect_24.c scan-assembler-times sub\\\\s+x[0-9]+, x[0-9]+, 61440 4
FAIL: gcc.target/aarch64/sve/struct_vect_24.c scan-assembler-times cmp\\s+x[0-9]+, 61440 4
FAIL: gcc.target/aarch64/sve/struct_vect_24.c scan-assembler-times sub\\s+x[0-9]+, x[0-9]+, 61440 4

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/ldp_stp_unaligned_2.c: Use -fno-stack-protector.
	* gcc.target/aarch64/shadow_call_stack_5.c: Likewise.
	* gcc.target/aarch64/shadow_call_stack_6.c: Likewise.
	* gcc.target/aarch64/shadow_call_stack_7.c: Likewise.
	* gcc.target/aarch64/shadow_call_stack_8.c: Likewise.
	* gcc.target/aarch64/stack-check-12.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-11.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-12.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-13.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-14.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-15.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-17.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-18.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-19.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-2.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-5.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-6.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-8.c: Likewise.
	* gcc.target/aarch64/stack-check-prologue-9.c: Likewise.
	* gcc.target/aarch64/sve/struct_vect_24.c: Likewise.
	* gcc.target/aarch64/test_frame_1.c: Likewise.
	* gcc.target/aarch64/test_frame_10.c: Likewise.
	* gcc.target/aarch64/test_frame_11.c: Likewise.
	* gcc.target/aarch64/test_frame_13.c: Likewise.
	* gcc.target/aarch64/test_frame_15.c: Likewise.
	* gcc.target/aarch64/test_frame_2.c: Likewise.
	* gcc.target/aarch64/test_frame_4.c: Likewise.
	* gcc.target/aarch64/test_frame_6.c: Likewise.
	* gcc.target/aarch64/test_frame_7.c: Likewise.
	* gcc.target/aarch64/test_frame_8.c: Likewise.