Auto merge of #3648 - cuviper:powerpc64-gcc4, r=alexcrichton
authorbors <bors@rust-lang.org>
Sat, 4 Feb 2017 19:28:44 +0000 (19:28 +0000)
committerbors <bors@rust-lang.org>
Sat, 4 Feb 2017 19:28:44 +0000 (19:28 +0000)
Update OPENSSL_CC_powerpc64-unknown-linux-gnu

With the new `rust-slave-linux-cross:2017-02-02`, powerpc64 no longer
uses gcc-5.  I updated the `Dockerfile` at the time to reflect this, but
missed `OPENSSL_CC_powerpc64-unknown-linux-gnu` in `Makefile.in`.


Trivial merge