added `HAS_PYTHONAPI` for compatibilty with newer versions of `pypy`
added `HAS_PYTHONAPI` for compatibilty with newer versions of `pypy`


git-svn-id: df3a7ed15ef7bc1bd4e913d3c8231ba6def0a9e6@732 8bfda07e-5b16-0410-ab1d-fd04ec2748df

mindw/dill,wxiang7/dill