xbmc: update to xbmc-12.2-88bbd20

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-driver: update to bcm2835-driver-7d8a762

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: update to bcm2835-bootloader-7d8a762

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libX11: update to libX11-1.6.2

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