Patch merged into coreboot/master: libpayload: Keep stack boundary small on x86

the following patch was just integrated into master:
commit 909b916e56dcbb9e4fa1334055cea998b03d99b4
Author: Stefan Reinauer 
Date:   Wed Jul 1 11:31:40 2015 -0700

libpayload: Keep stack boundary small on x86

There is no measurable performance impact, but
    this positively impacts the memory used by payloads.

Change-Id: Ib2bdba4a7bf2a4c2391a20b3225bbb44422d3194
    Signed-off-by: Stefan Reinauer 
    Reviewed-on: http://review.coreboot.org/10751
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/10751 for details.

-gerrit