moved several config and test scripts from /root to the gta04-kernel project so that they can better be kept in sync with kernel developments

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
xserverrc: better handle board variants and enable backlight for the Pyra board by default

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>