E (RandR): Add function prototype to retrieve monitor's output.
E (RandR): Add function prototype to retrieve monitor's output.

Signed-off-by: Christopher Michael <cp.michael@samsung.com>

SVN revision: 77866

rvandegrift/e,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tasn/enlightenment