Change s390-linux-gnu as secondary release platform to s390x-linux-gnu

[Gerald Pfeifer]

We discussed this on the steering committee (someone reminded us a
bit ago) and Ulrich and Andreas agree, too, so I went ahead an updated
the documentation.

Gerald

Index: gcc-4.6/criteria.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.6/criteria.html,v
retrieving revision 1.2
diff -u -3 -p -r1.2 criteria.html
--- gcc-4.6/criteria.html	11 Jul 2010 19:35:36 -0000	1.2
+++ gcc-4.6/criteria.html	6 Sep 2010 23:50:26 -0000
@@ -116,7 +116,7 @@ application testing.</p>
 <li>i686-pc-cygwin</li>
 <li>i686-mingw32</li>
 <li>ia64-unknown-linux-gnu</li>
-<li>s390-linux-gnu</li>
+<li>s390x-linux-gnu</li>
 </ul>
 
 <h1>Code Quality and Compilation Time</h1>