Fix shmop test leaking private shared memory

Author: NickSdot

ext/shmop/tests/shmop_open_private.phpt

@@ -13,6 +13,8 @@ $shm2 = shmop_open(0, 'c', 0777, 1024);
 $read = shmop_read($shm2, 0, 4);
 
 var_dump(is_string($read) && $read !== $write);
+shmop_delete($shm1);
+shmop_delete($shm2);
 ?>
 --EXPECT--
 bool(true)