recipes-bsp: barebox: v2017.12.0: Add environment for RAUC
recipes-bsp: barebox: v2017.12.0: Add environment for RAUC

These changes in the environment create additional boot scripts for eMMC
and NAND, add scripts to create and init flash partitions and set up the
bootchooser variables correctly.

Signed-off-by: Daniel Schultz <adff8adca0fa13ca885c17ff484bfc0eae7d2508@phytec.de>
Signed-off-by: Stefan Müller-Klieser <a3e08e35e4a42be768e7d0e76ae1ba321c2a66dd@phytec.de>

PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec