Auto merge of #3650 - bluetech:profile-doc-fix, r=alexcrichton
authorbors <bors@rust-lang.org>
Sun, 5 Feb 2017 21:06:08 +0000 (21:06 +0000)
committerbors <bors@rust-lang.org>
Sun, 5 Feb 2017 21:06:08 +0000 (21:06 +0000)
Fix the documentation for the PROFILE envvar passed to build scripts

Closes #2084 (+ a typo fix).


Trivial merge