Patch merged into coreboot/master: 3ee4317 payloads: make build system integration work again

the following patch was just integrated into master:
commit 3ee43171ef4b2f5a3513fc785802a02afb4af4a9
Author: Patrick Georgi 
Date:   Fri May 9 20:41:01 2014 +0200

payloads: make build system integration work again

Payloads using Kconfig get confused by coreboot Kconfig
    configuration in environment variables. Prune them.

Change-Id: I63da2af0a15dca35d70cd65b2f74a1564aab9483
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/5710
    Reviewed-by: Edward O'Callaghan 
    Tested-by: build bot (Jenkins)
    Reviewed-by: Idwer Vollering

See http://review.coreboot.org/5710 for details.

-gerrit