Spinner: Add changed callback call when spinner value set.

Summary:
There is a code to compare value is changed.
1256: if (sd->val == val) return;

Even value changed the value changed callback didn't called before.

Reviewers: woohyun, shilpasingh, Hermet

Reviewed By: shilpasingh, Hermet

Differential Revision: https://phab.enlightenment.org/D2560

legacy/elementary/src/lib/elm_spinner.c

@@ -1268,6 +1268,7 @@ _elm_spinner_value_set(Eo *obj, Elm_Spinner_Data *sd, double val)
      }
    _val_set(obj);
    _label_write(obj);
+   evas_object_smart_callback_call(obj, SIG_CHANGED, NULL);
 }
 
 EOLIAN static double