[compiler-rt] [sanitizer] Support "alloc_dealloc_mismatch" suppressions (PR #124197)

[Ben Langmuir via llvm-commits]

benlangmuir wrote:

This is failing on Darwin: https://green.lab.llvm.org/job/llvm.org/job/clang-stage1-cmake-RA-expensive/3243/testReport/junit/AddressSanitizer-x86_64-darwin/TestCases/suppressions_alloc_dealloc_mismatch_cpp/

```
suppressions-alloc-dealloc-mismatch.cpp:23:17: error: CHECK-CRASH: expected string not found in input
// CHECK-CRASH: AddressSanitizer: alloc-dealloc-mismatch
                ^
<stdin>:1:1: note: scanning from here
strlen ignored, len = 0
^
```

https://github.com/llvm/llvm-project/pull/124197