Patch merged into coreboot/master: toolchain.inc: Test for valid toolchain when ANY_TOOLCHAIN is used

the following patch was just integrated into master:
commit af91b8b086b6fd087a99a4e88ad76e46defacf9b
Author: Martin Roth 
Date:   Mon Dec 7 14:33:44 2015 -0700

toolchain.inc: Test for valid toolchain when ANY_TOOLCHAIN is used

Even when ANY_TOOLCHAIN is selected, a valid compiler for the requested
    architecture is needed.

Change-Id: If1a0a1ca6b726e8e58d29c69de93546510582548
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/12681
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/12681 for details.

-gerrit