port-evbarm/51962: crossbuild for evbarm on Darwin broken

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>Number:         51962
>Category:       port-evbarm
>Synopsis:       crossbuild for evbarm on Darwin broken
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-evbarm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 10 06:10:00 +0000 2017
>Originator:     Sevan Janiyan
>Release:        
>Organization:
>Environment:
Darwin Kernel Version 15.6.0: Mon Jan  9 23:07:29 PST 2017; root:xnu-3248.60.11.2.1~1/RELEASE_X86_64 x86_64
>Description:
Attempting to crosscompile tools on Darwin fails with the following error:

usr/src/tools/gcc/../../external/gpl3/gcc/dist/gcc/config/arm/neon.md:3463:10917: fatal error: bracket nesting level exceeded maximum of 256

>How-To-Repeat:
Attempt to build tools on Darwin
./build.sh -U -m evbarm tools
>Fix: