[compiler-rt] [compiler-rt][rtsan] ppoll interception. (PR #120366)

[Chris Apple via llvm-commits]

https://github.com/cjappl approved this pull request.

If it LGTD (looks good to david) it LGTM.

Feel free to submit whenever @devnexen  

https://github.com/llvm/llvm-project/pull/120366