* Add SBRP packages to prev source-built
* Update to new version of prev source-built
* Update SBRP reference
* Don't delete SBRP packages
* Update private source-built version
* Initial checkin of source-build tarball build infra
* Add a couple more comments
* Update eng/SourceBuild.Version.Details.xml based on PR review
Co-authored-by: Chris Rummel <crummel@microsoft.com>
* Updates based on PR review comments
Co-authored-by: Chris Rummel <crummel@microsoft.com>