protocol: say update instead of repaint
protocol: say update instead of repaint

wl_surface.commit itself does not force any repainting unless there is
damage, so change the wording to not imply repainting.

Reported-by: John Kåre Alsaker <bad169083dd6691c5cb7a33b6df38e93cc0e2d6a@gmail.com>
Signed-off-by: Pekka Paalanen <6c0263d81461c956d504307112a4ce25eaacc3d1@gmail.com>

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