fix-tests
[libc] Add a linux Thread class in __support/threads.
[libc] Add implementations of pthread_equal and pthread_self.
[libc] Add implementation of call_once from threads.h.
[libc] Add a skeleton for C standard condition variable functions.
[libc][NFC] Add a platform independent thread support library.
[libc] Add mtx_destroy which does nothing.
[libc] Remove references to the std threads library from __support/threads.
[libc][NFC][Obvious] Fix few header guards in src/threads.
[libc][NFC] Remove the templatization from the linux implementation of thread.
[libc] Add pthread_detach and thrd_detach.