Auto merge of #4288 - matklad:bench-bench, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 17 Jul 2017 14:32:21 +0000 (14:32 +0000)
committerbors <bors@rust-lang.org>
Mon, 17 Jul 2017 14:32:21 +0000 (14:32 +0000)
Allow `src/bench.rs` as a benchmark for legacy reasons

closes #4287
cc #3947


Trivial merge