e_randr: better initial loading of x config
e_randr: better initial loading of x config

On first creation of randr config, get output position from crtc and
save config afterwards.

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