Auto merge of #3827 - alexcrichton:warnings-v2, r=matklad
authorbors <bors@rust-lang.org>
Mon, 13 Mar 2017 22:21:16 +0000 (22:21 +0000)
committerbors <bors@rust-lang.org>
Mon, 13 Mar 2017 22:21:16 +0000 (22:21 +0000)
Cap lints for upstream deps with `-vv`

Previously with `-vv` Cargo didn't pass `--cap-lints` at all, but with upstream
dependencies we still want to pass at least `--cap-lints warn` to make sure that
they're all still compiling.

Closes #3823


Trivial merge