[issue3871] cross and native build of python for mingw32 with packaging

[Zooko O'Whielacronx]

Changes by Zooko O'Whielacronx <zooko at zooko.com>:


----------
nosy:  -zooko

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3871>
_______________________________________