Auto merge of #5127 - ehuss:incremental-doc, r=alexcrichton
authorbors <bors@rust-lang.org>
Tue, 6 Mar 2018 03:22:33 +0000 (03:22 +0000)
committerbors <bors@rust-lang.org>
Tue, 6 Mar 2018 03:22:33 +0000 (03:22 +0000)
Fix reference docs for "incremental" in the wrong place.

It is part of the [build] section, not a [target].


Trivial merge