Patch merged into coreboot/master: 76db020 Update xcompile to search for x86_64 toolchain.

the following patch was just integrated into master:
commit 76db020f22bbe48c3cc78fd4ec5f8b77c66ceed6
Author: Marc Jones 
Date:   Wed Feb 22 11:46:17 2012 -0700

Update xcompile to search for x86_64 toolchain.

This adds detection of x86_64 gcc toolchain (which buildgcc can build
    if provided the option).

Change-Id: I8b12f3e705157741279c7347f4847fb50ccc2b0e
    Signed-off-by: Marc Jones

See http://review.coreboot.org/673 for details.

-gerrit