efl loop: implement loop.get property to return self

this means that on loop_get on any obj as long as its a child of a
loop obj... it'll retunr that loop now. it will work. no more code
needed.

we can shortcut this with ui/gfx objects returning the mainloop
singletone.

src/lib/ecore/ecore_main.c

@@ -2748,6 +2748,12 @@ _efl_loop_quit(Eo *obj EINA_UNUSED, Efl_Loop_Data *pd EINA_UNUSED)
    ecore_main_loop_quit();
 }
 
+EOLIAN static Eo_Base *
+_efl_loop_eo_base_loop_get(Eo *obj, Efl_Loop_Data *pd EINA_UNUSED)
+{
+   return obj;
+}
+
 static Eina_Bool
 _check_event_catcher_add(void *data, const Eo_Event *event)
 {

src/lib/ecore/efl_loop.eo

@@ -40,5 +40,6 @@ class Efl.Loop (Eo.Base)
    }
    implements {
       Eo.Base.constructor;
+      Eo.Base.loop.get;
    }
 }