If there is only Python bytecodes, then
the __init__.py script will be concatenated, and
the __init__.pyc as well.

This is becase this bit `path = os.path.join(path, '__init__'+extension)`
is iterated twice.

This is a bug in Python3, also because we ship bytecodes
instead of source code [ with Python & Python3 ].
Python is not affected.

Reported-by: Mirko Vogt <mirko@nanl.de>
Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>