Patch merged into coreboot/master: chromeos: Sign FW_MAIN_A and FW_MAIN_B

the following patch was just integrated into master:
commit 71ea717f726526c2f2b13eb6fc4ab5a85a36d587
Author: Patrick Georgi 
Date:   Tue Feb 2 17:52:09 2016 +0100

chromeos: Sign FW_MAIN_A and FW_MAIN_B

This requires payload integration somewhere to be useful, because
    without that, adding it will (hopefully) break the signature.

Change-Id: I67b8267e5040e26353df02d258e92a0610e19a52
    Signed-off-by: Patrick Georgi 
    Reviewed-on: https://review.coreboot.org/13560
    Reviewed-by: Aaron Durbin 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/13560 for details.

-gerrit