[compiler-rt] [compiler-rt] Also consider SIGPROF as a synchronous signal (PR #85188)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

@dvyukov @alexfh After running a random internal tests TSAN, not just compiler-rt tests, is still very broken after this patch.


https://github.com/llvm/llvm-project/pull/85188