Summary:
On Windows, compile a small C executable to prepend to the zip file, to allow
the resulting executable files to be run directly on Windows, without needing
to explicitly invoke the Python interpreter to run the output file.

Reviewed By: wez

Differential Revision: D17733616

fbshipit-source-id: 989a93851412d0bbe1e7857aa9111db082f67a4c