Add setup-environment and bblayers.conf files
These files are moved here from the manifest and meta-guf-distro repos. We want to include them in the manifest the regular way, without having to define links or wild copy actions from the .repo folder.
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These files are moved here from the manifest and meta-guf-distro repos. We want to include them in the manifest the regular way, without having to define links or wild copy actions from the .repo folder.