[llvm] [BOLT] Link pthread in Profile and Target libs to fix undefined pthread_rwlock_* symbols (PR #215748)

[via llvm-commits]

Thrrreeee wrote:

> LGTM. The `error: undefined symbol: pthread_rwlock_wrlock` issue does indeed occur in my build tests. However, this error seems to occur only on AArch64. This seems to be related to the `libc.so` version.




https://github.com/llvm/llvm-project/pull/215748