fixup! add missing endif

Author: Michael137

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx-simulators/string/main.cpp

@@ -83,7 +83,8 @@ template <class _CharT, class _Traits, class _Allocator> class basic_string {
 #else // !BITMASKS
     unsigned char __size_ : 7;
     unsigned char __is_long_ : 1;
-#endif
+#endif // BITMASKS
+#endif // SUBCLASS_PADDING
   };
 
 #ifdef BITMASKS