enable rwlock on aarch64

Author: SchrodingerZhu

libc/config/linux/aarch64/entrypoints.txt

@@ -644,6 +644,15 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.pthread.pthread_mutexattr_setrobust
     libc.src.pthread.pthread_mutexattr_settype
     libc.src.pthread.pthread_once
+    libc.src.pthread.pthread_rwlock_init
+    libc.src.pthread.pthread_rwlock_tryrdlock
+    libc.src.pthread.pthread_rwlock_rdlock
+    libc.src.pthread.pthread_rwlock_timedrdlock
+    libc.src.pthread.pthread_rwlock_trywrlock
+    libc.src.pthread.pthread_rwlock_wrlock
+    libc.src.pthread.pthread_rwlock_timedwrlock
+    libc.src.pthread.pthread_rwlock_unlock
+    libc.src.pthread.pthread_rwlock_destroy
     libc.src.pthread.pthread_rwlockattr_destroy
     libc.src.pthread.pthread_rwlockattr_getkind_np
     libc.src.pthread.pthread_rwlockattr_getpshared