Adjust hwasan testcase for x86 target.

There're 2 cases:
1. hwasan-poison-optimisation.c is supposed to scan call to
__hwasan_tag_mismatch4, and x86 have different mnemonic(call) from
aarch64(bl), so adjust testcase to scan either call or bl.

2. alloca-outside-caught.c/vararray-outside-caught.c are supposed to
scan mismatched tags and expected the tag corresponding to
out-of-bounds memory is 00, but for x86 the continous stack is
allocated by other local variable/array which is assigned with a
different tag, but still there're mismatches. So adjust testcase to
scan XX/XX instead of XX/00.

gcc/testsuite/ChangeLog:

	* c-c++-common/hwasan/alloca-outside-caught.c: Adjust
	testcase.
	* c-c++-common/hwasan/hwasan-poison-optimisation.c: Ditto.
	* c-c++-common/hwasan/vararray-outside-caught.c: Ditto.

gcc/testsuite/c-c++-common/hwasan/alloca-outside-caught.c

@@ -20,6 +20,6 @@ main ()
 }
 
 /* { dg-output "HWAddressSanitizer: tag-mismatch on address 0x\[0-9a-f\]*.*" } */
-/* { dg-output "READ of size 4 at 0x\[0-9a-f\]* tags: \[\[:xdigit:\]\]\[\[:xdigit:\]\]/00.* \\(ptr/mem\\) in thread T0.*" } */
+/* { dg-output "READ of size 4 at 0x\[0-9a-f\]* tags: \[\[:xdigit:\]\]\[\[:xdigit:\]\]/\[\[:xdigit:\]\]\[\[:xdigit:\]\].* \\(ptr/mem\\) in thread T0.*" } */
 /* { dg-output "Address 0x\[0-9a-f\]* is located in stack of thread T0.*" } */
 /* { dg-output "SUMMARY: HWAddressSanitizer: tag-mismatch \[^\n\]*.*" } */

gcc/testsuite/c-c++-common/hwasan/hwasan-poison-optimisation.c

@@ -22,7 +22,7 @@ main ()
 }
 
 /* { dg-final { scan-tree-dump-times "ASAN_POISON" 1 "asan1" }  } */
-/* { dg-final { scan-assembler-times "bl\\s*__hwasan_tag_mismatch4" 1 } } */
+/* { dg-final { scan-assembler-times "(?:bl|call)\\s*__hwasan_tag_mismatch4" 1 } } */
 /* { dg-output "HWAddressSanitizer: tag-mismatch on address 0x\[0-9a-f\]*.*" } */
 /* { dg-output "READ of size 4 at 0x\[0-9a-f\]* tags: \[\[:xdigit:\]\]\[\[:xdigit:\]\]/00 \\(ptr/mem\\) in thread T0.*" } */
 /* { dg-output "Address 0x\[0-9a-f\]* is located in stack of thread T0.*" } */

gcc/testsuite/c-c++-common/hwasan/vararray-outside-caught.c

@@ -17,6 +17,6 @@ main ()
 }
 
 /* { dg-output "HWAddressSanitizer: tag-mismatch on address 0x\[0-9a-f\]*.*" } */
-/* { dg-output "READ of size 4 at 0x\[0-9a-f\]* tags: \[\[:xdigit:\]\]\[\[:xdigit:\]\]/00 \\(ptr/mem\\) in thread T0.*" } */
+/* { dg-output "READ of size 4 at 0x\[0-9a-f\]* tags: \[\[:xdigit:\]\]\[\[:xdigit:\]\]/\[\[:xdigit:\]\]\[\[:xdigit:\]\].*\\(ptr/mem\\) in thread T0.*" } */
 /* { dg-output "Address 0x\[0-9a-f\]* is located in stack of thread T0.*" } */
 /* { dg-output "SUMMARY: HWAddressSanitizer: tag-mismatch \[^\n\]*.*" } */