Patch merged into coreboot/master: genbuild_h: actually make date(1) based timestamp locale independent

the following patch was just integrated into master:
commit f260f51834a8472bba72f4cb3c8af7141be1b697
Author: Patrick Georgi 
Date:   Sun Aug 9 20:53:16 2015 +0200

genbuild_h: actually make date(1) based timestamp locale independent

This fixes the botched fix in commit d9bc2fadc4ea74ebca0d793aeef288fe9f1acf0c

Change-Id: I0c4445af2851bc80fabb631864321a56123ce7b0
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/11146
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/11146 for details.

-gerrit