Add hung bots to sheriff-o-matic view

Tools/GardeningServer/model/ct-builder-list.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <link rel='import' href='ct-builder.html'>
 
 <script>
 // .builders[i] will have the CTBuilder objects
 function CTBuilderList(failures) {
   this.builders = [];
 
+  if (!Array.isArray(failures))
+    failures = [failures];
+
   var builderMap = {};
   failures.forEach(function(failure) {
     var results = failure.resultNodesByBuilder;
     Object.keys(results, (function(builder, result) {
       if (!builderMap[builder])
         builderMap[builder] = {};
       // This assumes that duplicate builder/master pairs all have the same
       // earliestFailingBuild.
       builderMap[builder][result.masterUrl] = {
         earliestFailingBuild: result.earliestFailingBuild,
         failingBuildCount: result.failingBuildCount,
       };
     }).bind(this));
   }, this);
 
   Object.keys(builderMap).sort().forEach(function(builder) {
     Object.keys(builderMap[builder]).sort().forEach(function(masterUrl) {
       var result = builderMap[builder][masterUrl];
       this.builders.push(new CTBuilder(masterUrl, builder,
           result.earliestFailingBuild, result.failingBuildCount));
     }, this);
   }, this);
 }
 </script>