[clang] [compiler-rt] [compiler-rt] Realtime Sanitizer: Introduce Realtime Sanitizer (RTSan) backend (PR #92460)

[Mike Hommey via llvm-commits]

glandium wrote:

This also breaks building the compiler-rt for older android versions, because pthread_spinlock_t is only defined when __ANDROID_API__ >= 24.

https://github.com/llvm/llvm-project/pull/92460