[PATCH] TILE-Gx: add release note on tilegx big endian support in wwwdocs

[Walter Lee]

Here is a release note item for big endian support on tilegx.  Ok to
commit once that change is approved?

--- gcc-4.9/changes.html        28 Jan 2014 23:57:49 -0000      1.54
+++ gcc-4.9/changes.html        30 Jan 2014 20:46:32 -0000
@@ -494,6 +494,12 @@ auto incr = [](auto x) { return x++; };
     will result in a warning and will not influence code generation.</li>
   </ul>
 
+<h3 id="tilegx">TILE-Gx</h3>
+
+  <ul>
+    <li>Added support for big endian.</li>
+  </ul>
+
 <!--
 <h2>Documentation improvements</h2>
 -->