BuildStream builds should bootstrap from Baserock binaries, not the Freedesktop SDK
See https://listmaster.pepperfish.net/pipermail/baserock-dev-baserock.org/2017-September/013811.html for a bit of context.
This merge request changes the BuildStream bootstrap elements to start from binaries that are stored in https://ostree.baserock.org/releases, which I originally built from the stage3-sysroot.bst element following the instructions in the README.
Support for more architectures will follow!
Please don't rebase this branch as the sysroot binaries contain a metadata file that refers back to a commit in this branch.
Here's what the metadata file looks like in the sysroot:
description: | This sysroot was produced by the Baserock project. See <http://www.baserock.org/> for more information. project-repo: https://www.gitlab.com/baserock/definitions project-commit: d1b8c40dd25d7419eed328eb5d11e6606cc7619b build-tool: Buildstream build-tool-version: bst, version 0.1.dev1422+g35d7051.d20171024