boardconfig|flashall: add support of persist image
Add copy of persist image in TARGET_OUT folder. Add support of persist image in flashll script.
Signed-off-by: Guillaume La Roque glaroque@baylibre.com
Add copy of persist image in TARGET_OUT folder. Add support of persist image in flashll script.
Signed-off-by: Guillaume La Roque glaroque@baylibre.com