[Patch 2 wwwdocs] gcc-4.7/changes.html : Document AMD bdver2

[Kumar, Venkataramanan]

Hi Maintainers,

This patch adds bdver2 description in changes.html.

Index: changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.7/changes.html,v
retrieving revision 1.90
diff -r1.90 changes.html
676a677,679
>     <li>Support for AMD Bulldozer (family 15) processors is now available
>       through the <code>-march=bdver2</code> and <code>-mtune=bdver2</code>
>       options.</li>


Ok for trunk?

Regards,
Venkat.