message: add git-revision arg
diff: @@ -47,9 +47,9 @@ It requires the following:
  - A GitHub token. Go to the GitHub settings page [Personal Access Tokens](https://github.com/settings/tokens) and create a token. Save the token secret to `mongo-cxx-driver-release/github_token.txt`.
  - Jira OAuth credentials. Ask for these from a team member. Save it to `mongo-cxx-driver-release/jira_creds.txt`.
  -Run the release script with no arguments.
  +Run the release script with the git tag created above as an argument.
  ```
  -python ./etc/make_release.py
  +python ./etc/make_release.py r3.6.0
  ```
  If all goes well, this should build and test the tarball and draft the GitHub release.
  