Patch merged into coreboot/master: build system: move defconfig creation into a cbfs-files filter

the following patch was just integrated into master:
commit 551b3830c66bfa1241d84f7ef9f89e8408231a00
Author: Patrick Georgi 
Date:   Wed Nov 25 18:47:56 2015 +0100

build system: move defconfig creation into a cbfs-files filter

That allows this special case to become a normal cbfs-files instance,
    too.

Change-Id: I896ffebe4cec64c9c11605b4f09c7790e5419928
    Signed-off-by: Patrick Georgi 
    Reviewed-on: https://review.coreboot.org/12539
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/12539 for details.

-gerrit