_thr_mutexattr_destroy
[PJT_MUTEXATTR_DESTROY] = {DUAL_ENTRY(_thr_mutexattr_destroy)},
__weak_reference(_thr_mutexattr_destroy, pthread_mutexattr_destroy);
__weak_reference(_thr_mutexattr_destroy, _pthread_mutexattr_destroy);
int _thr_mutexattr_destroy(pthread_mutexattr_t *);