Adds git date plus git commit sha to static builds if the version being built for is a development version Output is similar to: `docker-18.02.0-ce-dev-20180120.170357-fa4fb35.tgz` Signed-off-by: Eli Uriegas <eli.uriegas@docker.com> Upstream-commit: 8a86c3a6a54760b19cd67854bf68e408bd2a17fb Component: packaging