Add example to test the Python module being renamed to __init__.py

This examples tests the SWIG generated module being placed into a directory and
then renamed __init__.py to convert the module into a package. This ability
stopped working in swig-3.0.9. However, only Python 2.7 or 3.3 and later work. If
Python 3.2 support is needed, use moduleimport in %module to customise the import
code.

Issue #1282
8 files changed