Ecore_Wayland: When handling wayland interfaces (during startup), we

Ecore_Wayland: When handling wayland interfaces (during startup), we
cannot depend on the order in which the interfaces are given to us, so
we cannot create the data_device until we have both the input device
and the data_device_manager. Fix that.

Add more dnd code (not complete yet because frankly, the way Wayland
handles dnd & selection code is crappy, stupid, and difficult to
implement).

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/ecore@67247 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33