Do not add py2 addincl to modules with .swg inputs.
`PYTHON_ADDINCL()` breaks `PY3_LIBRARY` modules.
@@ -33,7 +33,6 @@ class Swig(iw.CustomCommand):
self._flags.extend(['-module', modname])
unit.onaddincl(incl_dirs)
- unit.onpython_addincl([])
if self._swig_lang == 'python':
self._out_name = modname + '.py'
