Auto merge of #3994 - matklad:blacklist, r=alexcrichton
authorbors <bors@rust-lang.org>
Thu, 4 May 2017 14:10:01 +0000 (14:10 +0000)
committerbors <bors@rust-lang.org>
Thu, 4 May 2017 14:10:01 +0000 (14:10 +0000)
Blacklist some binary names in `cargo new`

r? @alexcrichton

closes #3990


Trivial merge