[compiler-rt] [test][hwasan] Test function name in summaries #77391 (PR #77397)

[via llvm-commits]

dyung wrote:

Hi @vitalybuka, one of our internal build bots had a test failure in compiler-rt/test/hwasan/TestCases/allocator_returns_null.cpp after your change with an error similar to this:
```
/home/jenkins/j/w/compiler-rt/test/hwasan/TestCases/allocator_returns_null.cpp:96:18: error: CHECK-rCRASH: expected string not found in input
// CHECK-rCRASH: SUMMARY: HWAddressSanitizer: allocation-size-too-big {{.*}} in realloc
                 ^
<stdin>:1:9: note: scanning from here
realloc:
        ^
<stdin>:8:1: note: possible intended match here
SUMMARY: HWAddressSanitizer: allocation-size-too-big /home/jenkins/j/w/compiler-rt/lib/hwasan/hwasan_allocation_functions.cpp:135:3 in __sanitizer_realloc.part.0
^
```
Is this expected? If so, can the test be updated to work correctly with this slightly different output?

https://github.com/llvm/llvm-project/pull/77397