keyboard: Add rudimentary touch support to keyboard.
keyboard: Add rudimentary touch support to keyboard.

At this time there is no way to have a key be activated when
touch_up is called, so all this patch does is activate they
key on touch_down.

Signed-off-by: Brian J Lovin <d637578f5e2a9b6f1246159153ec9418006a1a47@intel.com>

Gnurou/weston,kwm81/weston,Tarnyko/weston-xdg_surface_present,xorgy/weston,mchalupa/weston,giucam/weston,eyolfson/weston,krezovic/weston,Fantu/compositor-spice,udoprog/weston,Gnurou/weston,xorgy/weston,jonnylamb/weston,krezovic/weston,jonnylamb/weston,Tarnyko/weston-xdg_surface_present,mchalupa/weston,sir-murray/weston,eyolfson/weston,giucam/weston,udoprog/weston,kwm81/weston,Fantu/compositor-spice,sir-murray/weston,Fantu/compositor-spice