RISC-V: Fix bogus FAILs of vsetvl testcases

Due the the global codes change which change the CFG cause bogus vsetvl checking FAILs.

Adapt testcases for the global codes change.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/vsetvl/avl_single-21.c: Adapt test.
	* gcc.target/riscv/rvv/vsetvl/avl_single-26.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/avl_single-39.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/avl_single-41.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/avl_single-6.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_conflict-12.c: Ditto.
	* gcc.target/riscv/rvv/vsetvl/vlmax_conflict-3.c: Ditto.