[PATCH][wwwdocs] Update changes.html with Cortex-A53 erratum workaround options

[Kyrill Tkachov]

Hi all,

This patch adds the Cortex-A53 erratum workaround options item to the 
changes page
(and adds the AArch64 section of that page in the process)
Ok?
Thanks,
KyrillIndex: htdocs/gcc-5/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-5/changes.html,v
retrieving revision 1.19
diff -U 3 -r1.19 changes.html
--- htdocs/gcc-5/changes.html	17 Oct 2014 12:30:48 -0000	1.19
+++ htdocs/gcc-5/changes.html	29 Oct 2014 14:04:28 -0000
@@ -217,7 +217,18 @@
 <!-- h3 id="go">Go</h3 -->
 <!--h3 id="java">Java (GCJ)</h3-->
 
-<!-- h2 id="targets">New Targets and Target Specific Improvements</h2 -->
+<h2 id="targets">New Targets and Target Specific Improvements</h2>
+
+<h3 id="aarch64">AArch64</h3>
+   <ul>
+     <li> A workaround for the ARM Cortex-A53 erratum 835769 has been
+       added and can be enabled by giving the
+       <code>-mfix-cortex-a53-835769</code> option.
+       Alternatively it can be enabled by default by configuring GCC with the
+       <code>--enable-fix-cortex-a53-835769</code> option.
+     </li>
+
+   </ul>
 
 <h2 id="os">Operating Systems</h2>