pytype: stop excluding procutil.py
This avoids these false warnings:
File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 78, in <module>:
No attribute 'register' on Type[io.BufferedIOBase] [attribute-error]
File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 117, in <module>:
No attribute 'register' on Type[io.IOBase] [attribute-error]
File "/mnt/c/Users/Matt/hg/mercurial/utils/procutil.py", line 770, in runbgcommandpy3:
No attribute 'close' on int [attribute-error]
In Union[IO[Union[bytes, str]], int]
Differential Revision: https://phab.mercurial-scm.org/D11927
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)