[PATCH] beagleboard-test-scripts: BeagleBoard userbutton detection for flashing

* Build and install a userbutton tool to detect state of the user button on a BeagleBoard from /dev/input/event0
* Install a user.txt and uEnv.txt to /boot, Narcissus will copy from here to the FAT partition of an SD Card

Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>

Would it be possible for amyone to pull this patch into the OE
maintenance/dev trees?