Auto merge of #4914 - xftroxgpx:doc_profile_section_in_workspace_only, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 8 Jan 2018 15:49:18 +0000 (15:49 +0000)
committerbors <bors@rust-lang.org>
Mon, 8 Jan 2018 15:49:18 +0000 (15:49 +0000)
doc: [profile.*] sections are for root crate only

ie.
warning: profiles for the non root package will be ignored, specify profiles at the workspace root

rendered:
![untitled2](https://user-images.githubusercontent.com/26243389/34655211-38d7ad18-f406-11e7-9857-76046aa14dea.png)

1  2 
src/doc/src/reference/manifest.md

Simple merge