projects/RPi: update to linux-3.12. cleanup linux-3.11

closes #2750
Mesa: update to Mesa-5442c0e, update upstream patches

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
v4l-utils: downgrade to v4l-utils-0.8.9
xbmc: update to xbmc-13.alpha-75170bd
xbmc-pvr-addons: update to xbmc-pvr-addons-accba45
xbmc-addon-xvdr: bump pvr api version. rename patch
xbmc-pvr-addons: update to xbmc-pvr-addons-54a6b9d
xbmc: update to xbmc-13.alpha-25965c1

closes #2754
samba: update to samba-3.6.20

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-driver: update to bcm2835-driver-e85b566

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: update to bcm2835-bootloader-e85b566

Signed-off-by: Stephan Raue <stephan@openelec.tv>
mkpkg_bcm2835-driver: speedup checkout and repack script, thanks to popcornmix

Signed-off-by: Stephan Raue <stephan@openelec.tv>
util-linux: update to util-linux-2.24

Signed-off-by: Stephan Raue <stephan@openelec.tv>
ethtool: update to ethtool-3.12.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>
pciutils: update to pciutils-3.2.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xorg-server: update to xorg-server-1.14.4

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xcb-proto: update to xcb-proto-1.9

Signed-off-by: Stephan Raue <stephan@openelec.tv>
libxcb: update to libxcb-1.9.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xtrans: update to xtrans-1.3.2

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