xwayland: Fix "-force-xrandr-emulation"
Commit 7cdcdfea introduced a new command line option "-force-xrandr-emulation", however it is missing from the ddxProcessArgument().
As a result, trying to use that command option would result in a error:
(EE) Unrecognized option: -force-xrandr-emulation
Make sure "-force-xrandr-emulation" is accounted for in Xwayland's ddxProcessArgument().
Signed-off-by: Olivier Fourdan ofourdan@redhat.com Fixes: 7cdcdfea - xwayland: Add -force-xrandr-emulation switch