Due to the effort of moving a way from non-prefixed protocols, rename
the weston specific screenshooter protocol to weston_screenshooter.
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Mariusz Ceier <mceier+wayland@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
