elm_spinner: Fixed to apply the %d format.
The part object does not apply the logic in efl_ui_format, so it does not work correctly when you format it with %d.
This is the commit that gets the necessary part of the logic of efl_ui_format.
Test Plan: elementary_test
Reviewed By: Jaehyun_Cho
Differential Revision: https://phab.enlightenment.org/D11378