make install-unpacked flattens the python hierarchy so result doesn't work
make install-unpacked flattens the python hierarchy so result doesn't work

the original oxt has the correct hierarchy but 'install' flattened it

Resolves:
https://github.com/voikko/libreoffice-voikko/issues/11
https://bugzilla.redhat.com/show_bug.cgi?id=1676830
https://bugs.documentfoundation.org/show_bug.cgi?id=122984

voikko/libreoffice-voikko