Add changelog for PR #1042

changelog.html

@@ -83,6 +83,9 @@ Upcoming changes</a>
   <li class=bug>
     Allow background tasks to run simultaneously, preventing task blockage.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-19622">issue 19622</a>)
+  <li class=bug>
+    Fixed failed tests displaying as Yellow in JUnit history plot
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-7866">issue 7866</a>)
 </ul>
 </div><!--=END=-->
 <h3><a name=v1.540>What's new in 1.540</a> (2013/11/17)</h3>