doc: Added API documentation for wl_display_create function.
doc: Added API documentation for wl_display_create function.

Signed-off-by: Srivardhan Hebbar <659686bdbb7daacc5b9d373146f7f28d52dc661b@samsung.com>

tulcod/wayland,abooij/wayland,tulcod/wayland,eyolfson/wayland,mchalupa/wayland,bitfactor/wayland,mchalupa/wayland,sir-murray/wayland,eyolfson/wayland,abooij/wayland,bitfactor/wayland,sir-murray/wayland,mchalupa/wayland,abooij/wayland,bitfactor/wayland,eyolfson/wayland,tulcod/wayland,sir-murray/wayland