nptl: Add missing __pthread_cond_wait alias in static builds

Fixes commit cf3fff1c19 ("nptl: Move
cnd_wait into libc").

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>

nptl/pthread_cond_wait.c

@@ -622,6 +622,9 @@ ___pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex)
 versioned_symbol (libc, ___pthread_cond_wait, pthread_cond_wait,
 		  GLIBC_2_3_2);
 libc_hidden_ver (___pthread_cond_wait, __pthread_cond_wait)
+#ifndef SHARED
+strong_alias (___pthread_cond_wait, __pthread_cond_wait)
+#endif
 
 /* See __pthread_cond_wait_common.  */
 int