Apps should not require ecore_x.

Apps should not require ecore_x.

The current UG_INIT_EFL() macro forces the applications who uses it to depend
on ecore_x. This patch uses a higher level of abstraction in this macro, this
approach lets ui-gadget-1 handle the display server without expose this to its
dependents.

Signed-off-by: Leandro Dorileo <leandro.maciel.dorileo@intel.com>
Signed-off-by: Fabio Mello <fabio.mello@intel.com>
Conflicts:

	CMakeLists.txt

Change-Id: I9a1683df1ee64b2d997b0edfedc6bfc695aed9e7