ecore_wl2_subsurf: follow wayland spec for sync
By default a sub-suface is synchronized mode.
So when a sub-surface is created, its sync value should be TRUE.
If the E works as specification, user cannot make it work as
desynchronized mode by calling subsurface.set_sync(FALSE).
is telling "A sub-surface is initially in the synchronized mode."
signed-off-by: Shawn Lee <firstname.lastname@example.org>
Reviewers: Hermet, zmike, devilhorns, raster
Reviewed By: devilhorns
Differential Revision: https://phab.enlightenment.org/D12098