[wwwdocs] fix gcc-3.2/changes.html links into GNATS

[Janis Johnson]

On Thu, May 15, 2003 at 03:30:29PM -0700, Joe Buck wrote:
> This patch changes the links to bug reports to use the new
> 
>      http://gcc.gnu.org/PRnnnn
> 
> form, which will continue to work after the bugzilla transition.
> Please apply.

Done.

Janis