[coreboot] Patch merged into coreboot/master: 1fc1ca9 abuild: abort if payload.sh failed

the following patch was just integrated into master:
commit 1fc1ca9986ad93f30eb82d23e8024a04398ea17f
Author: Patrick Georgi 
Date:   Mon Sep 24 20:52:42 2012 +0200

abuild: abort if payload.sh failed

With this chance it becomes practical to have payload.sh build/update
    the payload, and abort abuild if something bad happened.

Change-Id: Iee25de2e8b62153c477b8e5d32e097b59797523c
    Signed-off-by: Patrick Georgi

Build-Tested: build bot (Jenkins) at Tue Sep 25 11:53:51 2012, giving +1
Reviewed-By: Ronald G. Minnich  at Tue Sep 25 16:08:53 2012, giving +2
See http://review.coreboot.org/1536 for details.

-gerrit