Auto merge of #4033 - integer32llc:fix-sys-docs, r=alexcrichton
authorbors <bors@rust-lang.org>
Fri, 12 May 2017 05:11:06 +0000 (05:11 +0000)
committerbors <bors@rust-lang.org>
Fri, 12 May 2017 05:11:06 +0000 (05:11 +0000)
Clear up Linking to Systems Libraries docs

Fixes #2191.


Trivial merge