Milo: Prefetch logs that are failures

milo/appengine/swarming/html.go

Index: milo/appengine/swarming/html.go
diff --git a/milo/appengine/swarming/html.go b/milo/appengine/swarming/html.go
index 0ecb2d405b4582252015d3325e800b60ed2d1ef5..837fd8686eca07b6fb38b1051713620688915f31 100644
--- a/milo/appengine/swarming/html.go
+++ b/milo/appengine/swarming/html.go
@@ -86,14 +86,15 @@ func (b Build) Render(c context.Context, r *http.Request, p httprouter.Params) (
 		}
 	}
 
-	result, err := swarmingBuildImpl(c, r.URL.String(), getServer(r), id)
+	result, prefetch, err := swarmingBuildImpl(c, r.URL.String(), getServer(r), id)
 	if err != nil {
 		return nil, convertErr(err)
 	}
 
 	// Render into the template
 	args := &templates.Args{
-		"Build": result,
+		"Build":    result,
+		"Prefetch": prefetch,
 	}
 	return args, nil
 }