elm_main: call _elm_config_shutdown() after loop_iterate()

In _elm_config_shutdown(), _elm_config is freed.
So, if some ecore events call efl_ui_xxx API which refers _elm_config,
there can be crashes.

@fix

src/lib/elementary/elm_main.c

@@ -818,8 +818,8 @@ elm_quicklaunch_sub_shutdown(void)
         elm_color_class_shutdown();
      }
 
-   _elm_config_shutdown();
    ecore_main_loop_iterate();
+   _elm_config_shutdown();
 
    return _elm_sub_init_count;
 }