Python3: Inline "_PyType_CalculateMetaclass" for increased version coverage.
Python3: Inline "_PyType_CalculateMetaclass" for increased version coverage.

* It seems at least Ubuntu 11.04 has a version that didn't export the
  symbol.

* For the other versions, it's slightly more efficient code generated,
  but it doesn't matter.

* The real solution would be to write this as an internal helper function
  in Python, but that's not now.

wfxiang08/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka