xbmc: update to xbmc-13.alpha-0d22ffb
xf86-video-nvidia: update to xf86-video-nvidia-319.76
scripts/*: cleanup. handle old unpack stamps
scripts/unpack: simple need_unpack replacement
config/options: prepare to clean up need_unpack
config/functions: fix kernel_path()
scripts/unpack: force rebuild on scripts/* change