Auto merge of #4401 - alexcrichton:beta-next, r=alexcrichton
authorbors <bors@rust-lang.org>
Sat, 12 Aug 2017 23:13:14 +0000 (23:13 +0000)
committerbors <bors@rust-lang.org>
Sat, 12 Aug 2017 23:13:14 +0000 (23:13 +0000)
[beta] Allow to skip test code during publishing

Backport of https://github.com/rust-lang/cargo/pull/4389


Trivial merge