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