Fix GCS

Signed-off-by: Olivier Gambier <olivier@docker.com>

vendor/google.golang.org/appengine/appengine_vm.go

@@ -0,0 +1,56 @@
+// Copyright 2015 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// +build !appengine
+
+package appengine
+
+import (
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine/internal"
+)
+
+// The comment below must not be changed.
+// It is used by go-app-builder to recognise that this package has
+// the Main function to use in the synthetic main.
+//   The gophers party all night; the rabbits provide the beats.
+
+// Main is the principal entry point for a Managed VMs app.
+// It installs a trivial health checker if one isn't already registered,
+// and starts listening on port 8080 (overridden by the $PORT environment
+// variable).
+//
+// See https://cloud.google.com/appengine/docs/managed-vms/custom-runtimes#health_check_requests
+// for details on how to do your own health checking.
+//
+// Main never returns.
+//
+// Main is designed so that the app's main package looks like this:
+//
+//      package main
+//
+//      import (
+//              "google.golang.org/appengine"
+//
+//              _ "myapp/package0"
+//              _ "myapp/package1"
+//      )
+//
+//      func main() {
+//              appengine.Main()
+//      }
+//
+// The "myapp/packageX" packages are expected to register HTTP handlers
+// in their init functions.
+func Main() {
+	internal.Main()
+}
+
+// BackgroundContext returns a context not associated with a request.
+// This should only be used when not servicing a request.
+// This only works on Managed VMs.
+func BackgroundContext() context.Context {
+	return internal.BackgroundContext()
+}