rauc: new package

rauc: new package

RAUC is the Robust Auto-Update Controller developed by the folks at
Pengutronix. It supports updating embedded systems from the network
(ex: HawkBit) or from a disk and provides a d-bus interface.

Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>