[issue21907] Update Windows build batch scripts

[Roundup Robot]

Roundup Robot added the comment:

New changeset 4890a55c62ab by Zachary Ware in branch '2.7':
Clean up/refactor the batch scripts used for building on Windows.
https://hg.python.org/cpython/rev/4890a55c62ab

New changeset a6ceb631c747 by Zachary Ware in branch '3.4':
Clean up/refactor the batch scripts used for building on Windows.
https://hg.python.org/cpython/rev/a6ceb631c747

New changeset e6a95bda2943 by Zachary Ware in branch '3.5':
Merge forward extras beyond #21907 backport.
https://hg.python.org/cpython/rev/e6a95bda2943

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21907>
_______________________________________