Patch merged into coreboot/master: libpayload: Allow for KBUILD_DEFCONFIG override

the following patch was just integrated into master:
commit db0c0c4a606852bd7e52ad88850e7b2441454050
Author: Paul Kocialkowski 
Date:   Mon Aug 3 14:05:33 2015 +0200

libpayload: Allow for KBUILD_DEFCONFIG override

In order to specify a defconfig to libpayload, one might want to declare
    KBUILD_DEFCONFIG in the make command line and run the defconfig target.

Change-Id: I2ade6f4ff2f0b6478a0831158028ebc79b5daa81
    Signed-off-by: Paul Kocialkowski 
    Reviewed-on: http://review.coreboot.org/11112
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/11112 for details.

-gerrit