UBNT  路由器编译

参考 https://community.ui.com/questions/Golang-support-on-ER-X/7dd19ca6-3eee-4bb6-a4c6-8e5ea0fb37a0

> 基于Cavium平台,如 ER-Lite-3
```
$ GOOS=linux GOARCH=mips go build -o mybinary
$ scp mybinary user@ip:/home/user
```

> 基于Mediatek平台，如 ER-X
```
$ GOOS=linux GOARCH=mipsle go build -o mybinary
$ scp mybinary user@ip:/home/user
```
