[wwwdocs] libstdc++ updates for gcc-4.7/changes.html

[Jonathan Wakely]

I've committed the attached patch, please add any other v3 changes
worth mentioning

Index: htdocs/gcc-4.7/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.7/changes.html,v
retrieving revision 1.25
diff -u -r1.25 changes.html
--- htdocs/gcc-4.7/changes.html 2 Aug 2011 17:06:21 -0000       1.25
+++ htdocs/gcc-4.7/changes.html 3 Aug 2011 20:25:59 -0000
@@ -155,6 +155,28 @@
   
   <h4>Runtime Library (libstdc++)</h4>
 
+  <ul>
+    <li><a 
href="http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x";>
+       Improved experimental support for the upcoming ISO C++ standard, 
+       C++0x</a>, including:
+       <ul>
+         <li> using <code>noexcept</code> in most of the library;</li>
+         <li> partial implementations of <code>pointer_traits</code> and 
+              <code>allocator_traits</code>;</li>
+         <li> implementation of <code>scoped_allocator_adaptor</code>; </li>
+         <li> uses-allocator construction for <code>tuple</code>; </li>
+         <li> <code>vector</code> meets the allocator-aware container 
requirements; </li>
+         <li> replacing <code>monotonic_clock</code> with 
<code>steady_clock</code>; </li>
+         <li> many small improvements to conform to the FDIS. </li>
+       </ul>
+     </li>
+     <li>Added <code>--enable-clocale=newlib</code> configure option. </li>
+     <li>Debug Mode iterators for unordered associative containers. </li>
+     <li>Avoid polluting the global namespace by inclusion of 
<code>&lt;unistd.h&gt;</code>.  </li>
+
+
+  </ul>
+
 <h3 id="fortran">Fortran</h3>
   <ul>
     <li>The compile flag <a