USE_PYTHON=autoplist, which can occur, if relative paths are set in a
  setup.py script. Those cause pkg and QA sanity checks to misbehave.
- Remove @dirrm and @dirmmtry additions for USE_PYTHON=autoplist,
  USE_PYTHON=py3kplist and egg-info entries, if USES=python is set. pkg 1.3.8
  does not need those anymore.
- Add ${PYTHON_VER} to the PLIST_SUB defaults, if USES=python is set.

PR:		193885
Differential Revision:	D812
Reviewed by:	antoine@
Exp-run by:	antoine@
With hat:	python@