[coreboot-gerrit] Patch merged into coreboot/master: c0e394b build system: Only test for git once

the following patch was just integrated into master:
commit c0e394b7425b40c7d6c49d170054b71200d20515
Author: Patrick Georgi 
Date:   Wed Mar 4 15:02:03 2015 +0100

build system: Only test for git once

And then use the variable to decide what to do.

Change-Id: I48a801ecdbf774c4a8b64d7efaf9cf0ef2c2d438
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/8600
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/8600 for details.

-gerrit