xorg-server: update to xorg-server-1.16.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xz: update to xz-5.0.7

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc: update to xbmc-14-fa8281b

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