elm: make elm_object_text_get return markup info as well.

This commit solves following issue

https://phab.enlightenment.org/T6642

If I set object text as below
elm_object_text_set(btn, "Some<br>text");
then elm_object_text_get(btn) returns "Some text" not "Some<br>text".

src/lib/elementary/efl_ui_layout.c

@@ -2495,7 +2495,7 @@ elm_layout_text_get(const Eo *obj, const char *part)
    else if (!_elm_layout_part_aliasing_eval(obj, &part, EINA_TRUE))
      return NULL;
 
-   return efl_text_get(efl_part(obj, part));
+   return efl_text_markup_get(efl_part(obj, part));
 }
 
 EAPI Eina_Bool