hgext3rd/__init__.py

tests: conditionalize test-phases.t output for chg

IIUC chg loads the ProgrammingError class which leads to it directly referencing
it in error output. This makes the test pass on chg.

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)