[coreboot] Patch merged into coreboot/master: 6e7892a abuild: allow building with no payload

the following patch was just integrated into master:
commit 6e7892abf007fd9981449b9ec2f0f5980eab1850
Author: Patrick Georgi 
Date:   Sun Oct 7 15:05:42 2012 +0200

abuild: allow building with no payload

Change-Id: I167f0bb57bb40f0426182c0abe868bdad58eb120
    Signed-off-by: Patrick Georgi

Build-Tested: build bot (Jenkins) at Sun Oct  7 15:37:26 2012, giving +1
Reviewed-By: Stefan Reinauer  at Sun Oct 14 20:10:14 2012, giving +2
See http://review.coreboot.org/1563 for details.

-gerrit