Auto-build/update codegen Exempt-From-Owner-Approval: introduces separate utility; doesn't touch anything around it Test: 1. Manually enter version/presence of build artifact, and ensure `codegen FILENAME` still works 2. run codegen again without altering version, ensure no build triggered Change-Id: Iaa253a430e627d0e7c25781cde535958f77db97f 
2 files changed