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

[Chris Apple via llvm-commits]

cjappl wrote:

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

Thanks for reporting this @glandium ! I am in the process of disabling this for android as we speak. Let me know if you see anything else fishy

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