xorg-server: add some new default configure options

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: update to linux-3.12.5

Signed-off-by: Stephan Raue <stephan@openelec.tv>
config/graphic: enable (temporary)xinerama support for R600 GPUs

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
linux: update to linux-3.12.5
Merge pull request #2810 from pershoot/staging

linux: update to linux-3.12.5
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
config/functions: add get_build_dir()
vdr*: use get_build_dir()
buildsystem: clean up and cosmetics
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
Mesa: update to Mesa-10.0.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>
scripts/build: ensure that $PKG_BUILD is always created
... even if no unpack is called...

closes #2811