R1:d9f241a9cad8

Fix some argument parsing stuff in `reparse.php`

Summary: Currently, "reparse.php --message rXnnn" fails because $reparse_what is an array. Allow multiple named commits.

Test Plan:
$ ./scripts/repository/reparse.php --message rP9030fe8b0904b5291c69a22b0570a10013bba4b2 rP81946fc08d8a737b278255090e296ca92164d672
Running 'PhabricatorRepositoryGitCommitMessageParserWorker'...
Running 'PhabricatorRepositoryGitCommitMessageParserWorker'...

Done.

Reviewers: nh, vrana, btrahan

Reviewed By: nh

CC…