Patch merged into coreboot/master: build system: Add another post-processing step

the following patch was just integrated into master:
commit 4505787724616221a42a6cf81f89383d732a9cb3
Author: Patrick Georgi 
Date:   Tue Feb 2 17:38:45 2016 +0100

build system: Add another post-processing step

files_added is for rules that need to run after all CBFS processing is
    finished, such as SoC-specific postprocessing of the image, or for
    vboot, to sign the RW regions (that contain CBFS that shouldn't change
    afterwards.)

Change-Id: I830aa0c93429f4971cd68e4358faba5c206c0038
    Signed-off-by: Patrick Georgi 
    Reviewed-on: https://review.coreboot.org/13557
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/13557 for details.

-gerrit