Auto merge of #3395 - alexcrichton:fix-appveyor, r=alexcrichton
authorbors <bors@rust-lang.org>
Tue, 13 Dec 2016 18:55:46 +0000 (18:55 +0000)
committerbors <bors@rust-lang.org>
Tue, 13 Dec 2016 18:55:46 +0000 (18:55 +0000)
Pin to an older version of rustup temporarily

cc #3394


Trivial merge