[compiler-rt] [TySan] Fixed false positive when accessing offset member variables (PR #120406)

[via llvm-commits]

gbMattN wrote:

Does the odd behaviour you're seeing sound like whats described [in this pull request?](https://github.com/llvm/llvm-project/pull/120412). If not, please open an issue, I'd love to take a look at it!

https://github.com/llvm/llvm-project/pull/120406