ecore-wayland: Prevent duplicated mouse up events.

ecore-wayland: Prevent duplicated mouse up events.

Summary:
Prevent duplicated mouse up events generated from input_ungrab.
         If you touch downs and ups about all of fingers,
         that is sufficient condition to call ecore_wl_input_ungrab().
         And then one mouse up event is generated from that function.
         So if you set a callback about ECORE_EVENT_MOUSE_BUTTON_UP,
         you can watch two mouse up events are occurred.

Test Plan: Touch and release. And watch mouse up events.

Reviewers: raster, zmike, devilhorns

Reviewed By: devilhorns

Subscribers: ohduna, input.hacker, cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D4112