go: update go build rules

examples/go/echo_client.go

 // Copyright 2015 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.
 
 package main
 
 import (
         "fmt"
         "log"
 
         "code.google.com/p/go.mobile/app"
 
         "mojo/public/go/application"
         "mojo/public/go/bindings"
         "mojo/public/go/system"
 
         "examples/echo/echo"
 )
 
 //#include "mojo/public/c/system/types.h"
 import "C"
 
 type EchoClientDelegate struct {
         echo *echo.EchoProxy
 }
 
 func (delegate *EchoClientDelegate) Initialize(ctx application.Context) {
         echoRequest, echoPointer := echo.CreateMessagePipeForEcho()
-        ctx.ConnectToApplication("mojo:echo_server").ConnectToService(&echoRequest)
+        ctx.ConnectToApplication("mojo:go_echo_server").ConnectToService(&echoRequest)
         delegate.echo = echo.NewEchoProxy(echoPointer, bindings.GetAsyncWaiter())
         response, err := delegate.echo.EchoString(bindings.StringPointer("Hello, Go world!"))
         if response != nil {
-                fmt.Println(*response)
+                fmt.Printf("client: %s\n", *response)
         } else {
                 log.Println(err)
         }
 }
 
 func (delegate *EchoClientDelegate) AcceptConnection(connection *application.Connection) {
         connection.Close()
 }
 
 func (delegate *EchoClientDelegate) Quit() {
         delegate.echo.Close_proxy()
 }
 
 //export MojoMain
 func MojoMain(handle C.MojoHandle) C.MojoResult {
         application.Run(&EchoClientDelegate{}, system.MojoHandle(handle))
         return C.MOJO_RESULT_OK
 }
 
 func main() {
         app.Run(app.Callbacks{})
 }