cmd/scaleway, env/linux-arm/scaleway: notes, configs, and tools for Scaleway

This is what I used to start the ARM scaleway servers.

I forgot to mail it out. I'd like to submit this before I tweak it
further.

Updates golang/go#8647

Change-Id: Icf789de4e3acae8084fd75151ef5ef02d8073b73
Reviewed-on: https://go-review.googlesource.com/10052
Reviewed-by: Andrew Gerrand <adg@golang.org>
4 files changed