widget: fix the abi break.

Widget type string should be all lower-cases!

This acutally was caused in 7b10fdb8f39c3b36f575dd22d26a1efe6ecd28ec

@fix

legacy/elementary/src/lib/elm_widget.c

@@ -3684,7 +3684,7 @@ elm_widget_type_get(const Evas_Object *obj)
 {
    API_ENTRY return NULL;
 
-   return eo_class_name_get(eo_class_get(obj));
+   return evas_object_type_get(obj);
 }
 
 EAPI Eina_Bool