graphics/py-mcomix: unbreak with non-default python

> Checking for items in STAGEDIR missing from pkg-plist

Error: Orphaned: %%PYTHON_SITELIBDIR%%/mcomix/__pycache__/__init.cpython-38.pyc
Error: Orphaned: %%PYTHON_SITELIBDIR%%/mcomix/pycache__/about_dialog.cpython-38.pyc
Error: Orphaned: %%PYTHON_SITELIBDIR%%/mcomix/__pycache__/anime_tools.cpython-38.pyc
[...]

> Checking for items in pkg-plist which are not in STAGEDIR

Error: Missing: %%PYTHON_SITELIBDIR%%/mcomix/__pycache__/__init.cpython-37.pyc
Error: Missing: %%PYTHON_SITELIBDIR%%/mcomix/pycache__/about_dialog.cpython-37.pyc
Error: Missing: %%PYTHON_SITELIBDIR%%/mcomix/__pycache__/anime_tools.cpython-37.pyc
[...]

PR: 246084
Approved by: Stefan Ehmann (maintainer)