py3: add missing b prefixes in test-acl.t
There's one failure left in the test, which looks like a real problem
around executing hooks. I have not investigated further.
# skip-blame as just b'' prefixes
Differential Revision: https://phab.mercurial-scm.org/D5677
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)