Use go build, not go install because of golang issue

If you don't have write permission to the location of the 3rd party
deps, you can't use go install
  https://code.google.com/p/go/issues/detail?id=8521
You need to quote "${bin}", so the best is to create another variable for it:

```
    binary_name=$(basename "${bin}")
    go build -o "output/go/bin/${binary_name}" \
        ...
```