Patch merged into coreboot/master: buildgcc: Update LLVM to 3.7.1

the following patch was just integrated into master:
commit ea1a5fef4d3b57db1d9ad4adf13d6607fd2acd2f
Author: Stefan Reinauer 
Date:   Fri Jan 29 17:33:56 2016 -0800

buildgcc: Update LLVM to 3.7.1

Not much testing, update mostly so we can test with the
    latest scan-build.

Change-Id: I50d28b7e0dfd31f9ae565c8515d5ab1760ca4c62
    Signed-off-by: Stefan Reinauer 
    Reviewed-on: https://review.coreboot.org/13516
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/13516 for details.

-gerrit