Patch merged into coreboot/master: genbuild_h: Actually use git's current commit for timestamp if possible

the following patch was just integrated into master:
commit c07b7837162b9800fdd0deed6f0edde351796989
Author: Patrick Georgi 
Date:   Sun Aug 9 20:53:59 2015 +0200

genbuild_h: Actually use git's current commit for timestamp if possible

The test failed to trigger because top wasn't set.

Change-Id: I96de16a1b5cbc5a64d8e65ed84fd6849dd618e8f
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/11147
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/11147 for details.

-gerrit