rust-utils: add Rust implementation of Python's "os.path.splitdrive"
I also wrote the NT version although I didn't mean to at first, so I thought
I would keep it, so that any further effort to get the Rust code working on
Windows is a little easier.
Differential Revision: https://phab.mercurial-scm.org/D7864
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)