Renamed the upstream and downstream workspaces to "upstream" and "downstream", respectively. Change-Id: I28efd32a4fa4c05410940061c18bb463132d9450
These tools help compare android repo workspaces for high level analysis. Test: Run python repo_diff/repo_diff_android.py Change-Id: I645351521c7f61735d3ce65a93569983cd28851c