libcec: update to libcec-2.1.4

closes #2816
xf86-video-nvidia: update PKG_URL
libva-driver-intel: update to libva-driver-intel-1.2.2
keep waitonnetwork service damn simple

- an exit status is not needed here. we do not care if network is not up
  in the specified interval. it is up to the user to tune it
- VERBOSE is not used.
ffmpeg: add more xbmc patches
xbmc: update to xbmc-13.alpha-ee5f905