[coreboot-gerrit] Patch merged into filo/master: Sync with coreboot's latest xcompile script

the following patch was just integrated into master:
commit e7c85fe7178213489cc79f34ff9f34eebc3732f1
Author: Stefan Reinauer 
Date:   Wed Apr 13 17:18:08 2016 -0700

Sync with coreboot's latest xcompile script

This requires some rework of the Makefile, since
    .config now needs to be included before .xcompile, and
    the toolchain now supports multiple architectures.

Change-Id: I8ea3a4ed690144b4bcf3fb41263cf0ad2dfaa03d
    Signed-off-by: Stefan Reinauer 
    Reviewed-on: https://review.coreboot.org/14357
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/14357 for details.

-gerrit