build-tools 0.2.2
build-tools 0.2.2

Changes the `push-to-download-site` to an env var so that the
system can more easily be copied to other repos.

This is set in the `org-global` context of `nerves-project`
CircleCI settings to keep behavior working as is

nerves-project/nerves_system_rpi3,nerves-project/nerves_system_rpi3