This commit adds support for the wayland wp_viewport extension, note
nothing uses this yet.
This is a preparation patch for adding support for fake mode-changes through
xrandr for apps which want to change the resolution when going fullscreen.
[hdegoede@redhat.com: Split the code for the extension out into its own patch]
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
47bba46253