Patch merged into coreboot/master: util/crossgcc: Regenerate MPFR autotools files before build

the following patch was just integrated into master:
commit 68d0e4a5a1e7028227f6fbe086c891955cb7854e
Author: Timothy Pearson 
Date:   Wed Dec 30 14:52:19 2015 -0600

util/crossgcc: Regenerate MPFR autotools files before build

The config.guess file included with MPFR is completely obsolete,
    leading to build failures on ppc64el due to the system architecture
    not being detected.  Regenerate the files from the host system via
    automake before attempting to build MPFR.

Change-Id: I00fc16003906e373d112c25978197ac907adccfd
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/12816
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

See https://review.coreboot.org/12816 for details.

-gerrit