ecore-wl2: Prevent duplicated mouse up events

ecore-wl2: Prevent duplicated mouse up events

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.

This is a port of the patch for Ecore_Wayland library (deprecated) to
the newer Ecore_Wl2 library.

ref D4112

@fix

Signed-off-by: Chris Michael <cpmichael@osg.samsung.com>