libva-driver-intel: Add patch by btbn to track and workaround empty surfaces
libva: add patch to handle empty surfaces
xbmc: add VPP patches for intel vaapi (enables deinterlacing in gotham)
Merge pull request #2759 from fritsch/master

VAAPI: VPP deinterlacing thanks @btbn
xbmc: update to xbmc-13.alpha-aa4ca63
xbmc-pvr-addons: update to xbmc-pvr-addons-d4cb4d5
xbmc-addon-xvdr: sync xbmc.gui