Auto merge of #4139 - Keruspe:master, r=alexcrichton
authorbors <bors@rust-lang.org>
Wed, 7 Jun 2017 18:06:32 +0000 (18:06 +0000)
committerbors <bors@rust-lang.org>
Wed, 7 Jun 2017 18:06:32 +0000 (18:06 +0000)
Include rustc version in metadata

Followup to #4134
Fixes https://github.com/rust-lang/rust/issues/42483


Trivial merge