[compiler-rt] [compiler-rt][rtsan] Fix failing file permissions test (PR #106095)

[Chris Apple via llvm-commits]

cjappl wrote:

Unrelated test failure:

```
/var/lib/buildkite-agent/builds/linux-56-59b8f5d88-g9cxr-1/llvm-project/github-pull-requests/llvm/unittests/Analysis/UnrollAnalyzerTest.cpp:249: Failure
Value of: I1 != SimplifiedValuesVector[5].end()
  Actual: false
Expected: true
```

merging in a second

https://github.com/llvm/llvm-project/pull/106095