I found that go-bootstrap/go package cannot support aarch64 now.

If we want to support aarch64 , the flow is like that:

1. Download the 1'st arm64 version as below:
   https://dl.google.com/go/go1.8.7.linux-arm64.tar.gz

2. unpack go1.8.7.linux-arm64.tar.gz

3. export GO_BOOTSTRAP=/xxx/go

4. After finishing above steps, the latest go package can be download and compile.

But the question is that: I think it's totally deferent way of x86 bootstrap compare for the above steaps.
So I'm not sure how to modify the go-bootstrap package.py.

Is there any suggestion for developing this patch?