[compiler-rt] [compiler-rt][TSan] fix crash caused by intercpting pthread_detach on Android (PR #161596)

[via llvm-commits]

https://github.com/enh-google approved this pull request.

i'd only not clicked "approve" because i was too lazy to also type out "please wait for fmayer" :-)

https://github.com/llvm/llvm-project/pull/161596