[coreboot] Patch merged into coreboot/master: b21eaa7 ARMV7 and Google/Snow: Add exception support code to the ramstage

the following patch was just integrated into master:
commit b21eaa74a656fa33f943f76ea0c53ca8374760f6
Author: Ronald G. Minnich 
Date:   Thu Mar 7 15:23:45 2013 -0800

ARMV7 and Google/Snow: Add exception support code to the ramstage

This is previously used exception code from libpayload.
    On startup it installs and then tests an exception handler.
    The test is an unaligned memory operation.

Yes, we've seen what might be exceptions in the ramstage, and
    it makes sense to handle them. This code is identical in structure
    and operation to the previously committed payload exception handler,
    though we reserve the right to change it as circumstances require.

The remaining question is whether we need it in romstage.

Change-Id: I24484686c33c9757af8ba171ebae9773828fb69d
    Signed-off-by: Gabe Black 
    Signed-off-by: Ronald G. Minnich 
    Reviewed-on: http://review.coreboot.org/2614
    Tested-by: build bot (Jenkins)
    Reviewed-by: David Hendricks

Build-Tested: build bot (Jenkins) at Fri Mar  8 21:27:38 2013, giving +1
Reviewed-By: David Hendricks  at Fri Mar  8 21:30:06 2013, giving +2
See http://review.coreboot.org/2614 for details.

-gerrit