Milo: Add task expired as a failure status

milo/appengine/frontend/templates/buildbot/pages/build.html

 {{define "title"}}{{.Build.Summary.Label}}{{end}}
 
 {{define "head"}}{{end}}
 
 {{define "body"}}
   <div class="content">
     <h1>
       {{ if .Build.Summary.ParentLabel }}
         Builder {{ .Build.Summary.ParentLabel | linkify }}
       {{ end }}
@@ skipping 13 matching lines @@
     <div class="column">
 
       <h2>Results:</h2>
       {{ with .Build.Summary }}
         {{ if eq .Status.String "Running" }}
           <p class="running result">Build Running
         {{ else if eq .Status.String "Success" }}
           <p class="success result">Build Successful
         {{ else if eq .Status.String "InfraFailure" }}
           <p class="exception result">Internal Failure
+        {{ else if eq .Status.String "Expired" }}
+          <p class="expired result">Internal Failure - Expired
         {{ else if eq .Status.String "Failure" }}
           <p class="failure result">Build Failed
         {{ else if eq .Status.String "NotRun" }}
           <p class="pending result">Build Pending
         {{ else }}
           <p class="failure result">Unknown status {{.Status.String }}
         {{ end }}
         <span class="subtitle">
           {{ range .Text }}<div class="step-text">{{ . }}</div>{{ end }}
         </span>
@@ skipping 171 matching lines @@
   $(".verbosity-Hidden").each(function(i, obj) {
     if (checked) {
       $(this).removeClass("default");
     } else {
       $(this).addClass("default");
     }
   });
 });
 </script>
 {{end}}