Patch merged into coreboot/master: c4dbdaf xcompile: Rename aarch64 to arm64

the following patch was just integrated into master:
commit c4dbdaf50a8fa67e0d17e237eb0dcb6309240dd6
Author: Marc Jones 
Date:   Fri Jan 16 13:19:04 2015 -0700

xcompile: Rename aarch64 to arm64

coreboot toolchain.inc uses the ARCH_SUPPORTED variable set
    by xcompile. This change allows for consistent naming in the
    toolchain.inc generated variables.

Change-Id: Iafed06cf2d19a533f99e10b76aca82adc3e09fa8
    Signed-off-by: Marc Jones 
    Reviewed-on: http://review.coreboot.org/8235
    Reviewed-by: Stefan Reinauer 
    Reviewed-by: Paul Menzel 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/8235 for details.

-gerrit