Auto merge of #4740 - nox:rustdocflags, r=alexcrichton
authorbors <bors@rust-lang.org>
Fri, 1 Dec 2017 16:36:30 +0000 (16:36 +0000)
committerbors <bors@rust-lang.org>
Fri, 1 Dec 2017 16:36:30 +0000 (16:36 +0000)
Pass RUSTDOCFLAGS to rustdoc spawned through cargo test (fixes #4738)


Trivial merge