[Bug other/58467] Documentation of the "used" variable attribute needs additional information

[psmith at gnu dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58467

--- Comment #1 from Paul Smith <psmith at gnu dot org> ---
Housekeeping: it would be very nice to have a "Doc" component in bugzilla.  As
it was I picked "c" because it was that part of the docs.  Thx!