Patch merged into coreboot/master: util/crossgcc: Bump GMP version to 6.1.0

the following patch was just integrated into master:
commit 9631016660423d0585a145400232fd68b7e3da8f
Author: Timothy Pearson 
Date:   Mon Dec 28 22:53:29 2015 -0600

util/crossgcc: Bump GMP version to 6.1.0

The previous official GMP release (6.0.0) contains a bug that
    prevents compilation on ppc64el systems.  Increase version
    to the latest version (6.1.0).

Bug details:

gcc build on ppc64el fails with:
    (.text+0x4c): undefined reference to `BMOD_1_TO_MOD_1_THRESHOLD'

While I don't have an exact commit hash due to Hg use upstream,
    a missing BMOD_1_TO_MOD_1_THRESHOLD define on ppc64el was quietly
    fixed in Hg before the 6.1.0 release.

Change-Id: I1c05a1c194141db5f8522148c2e20e7558d34714
    Signed-off-by: Timothy Pearson 
    Reviewed-on: https://review.coreboot.org/12811
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Martin Roth 
    Reviewed-by: Ronald G. Minnich

See https://review.coreboot.org/12811 for details.

-gerrit