avahi: enable 'disallow-other-stacks' see http://forums.gentoo.org/viewtopic-p-7322172.html#7322172

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xf86-video-nvidia: update to xf86-video-nvidia-319.23

Signed-off-by: Stephan Raue <stephan@openelec.tv>