关于golang.org/x包问题
由于谷歌被墙，跟谷歌相关的模块无法通过go get来下载，解决方法：
@H_404_5@- git clone https://github.com/golang/net.git $GOPATH/src/github.com/golang/net
-
- git clone https://github.com/golang/sys.git $GOPATH/src/github.com/golang/sys
-
- git clone https://github.com/golang/tools.git $GOPATH/src/github.com/golang/tools
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- ln -s $GOPATH/src/github.com/golang $GOPATH/src/golang.org/x
