xorg: Bump xdriver_xf86-video-intel version to 2.99.907

- enable sna support by default, disable unneeded stuff
  ported from OpenELEC:
  https://github.com/OpenELEC/OpenELEC.tv/blob/master/packages/x11/driver/xf86-video-intel/package.mk



[Peter: drop Xtst dependency]
Signed-off-by: Bernd Kuhls <berndkuhls@hotmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>