[PATCH v4] beagleboard-test-scripts: Add a script flash-fs.sh for flashing NAND

This script flashes the NAND of a BeagleBoard if:
  * There is a valid image on the SD Card to flash
  * The board has NAND

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

This script flashes the NAND of a BeagleBoard if:
* There is a valid image on the SD Card to flash
* The board has NAND

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

For what it is worth:

Acked-by: Jason Kridner <jkridner@beagleboard.org>