[milo] {buildbucket,buildbot,swarming,logdog} -> backends/*.

milo/appengine/backends/buildbot/html_test.go

 // Copyright 2017 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package buildbot
 
 import (
         "net/http"
         "net/http/httptest"
         "net/url"
@@ skipping 89 matching lines @@
                         })
                         Convey(`Builder not found`, func() {
                                 rc := request(c, map[string]string{"master": "fake", "builder": "newline"})
                                 BuilderHandler(rc)
                                 response := rc.Writer.(*httptest.ResponseRecorder)
                                 So(response.Code, ShouldEqual, http.StatusNotFound)
                         })
                 })
         })
 }