Auto merge of #3638 - cuviper:custom-powerpc-s390x-1.16.0, r=alexcrichton
authorbors <bors@rust-lang.org>
Fri, 3 Feb 2017 09:24:50 +0000 (09:24 +0000)
committerbors <bors@rust-lang.org>
Fri, 3 Feb 2017 09:24:50 +0000 (09:24 +0000)
[rust-1.16.0] Update docker/cross for new IBM toolchains

This will start using the toolchains with older glibc ABI for powerpc,
powerpc64, powerpc64le, and s390x, per rust-lang/rust-buildbot#149.


Trivial merge