Document attributes related to linking: link, link_args, no_link, ...?

[pnkfelix]

Sub-bug of #6444

• link (Introduced by d4c40b5)
• link_args (Introduced by d4c40b5)
• link_name (already in rust.md; see commit 772028a)
• nolink

[huonw]

Triage: no progress.

[alexcrichton]

cc #9910

[flaper87]

visiting for triage. Updated the issue description and the parent issue with the latest commits that improved the documentation. nolink seems to still be missing.

[alexcrichton]

nolink is no longer an attribute, so it looks like this is done!

[flaper87]

@alexcrichton but we still have it in some modules like libc and os. Can those be removed then?

[alexcrichton]

Yes, they should be removed. I didn't realize we still had some lying around. If it's an allowed attribute in the lint passes that should also be removed.

[flaper87]

@alexcrichton ok, I'll get rid of them then. thanks