Fix vnc respawn on reboot/shutdown

When shutting down or rebooting, the vnc process will constantly
respawn, polluting the error log.  Fix it so when we shut down,
the vnc service does as well.

BUG=None
TEST=Reboot, monitor log file

Change-Id: Ib04fc733a4c6beb7dfb2280cb02c1ee432734ad8
Reviewed-on: https://gerrit.chromium.org/gerrit/24743
Tested-by: Jon Kliegman <kliegs@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Commit-Ready: Jon Kliegman <kliegs@chromium.org>
1 file changed