Patch merged into coreboot/master: chromeos: fix build issues within sar.c

the following patch was just integrated into master:
commit feb4ef6d92bdbcd12b2cd97b6446fb64b76cfef4
Author: Robbie Zhang 
Date:   Mon Jan 9 15:28:24 2017 -0800

chromeos: fix build issues within sar.c

Build issues were somehow overlooked in commit
    ed840023a84915ece4bc63edffef979926107d55:
    1. hexstrtobin is not defined (needs the lib.h);
    2. coreboot default compiler doesn't like variable initialization
       within for loop.

BUG=chrome-os-partner:60821
    TEST=Build and boot lars and reef

Change-Id: Ie52c1f93eee7d739b8aaf59604875f179dff60d0
    Signed-off-by: Robbie Zhang 
    Reviewed-on: https://review.coreboot.org/18076
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/18076 for details.

-gerrit