[issue23668] Support os.ftruncate on Windows

[Roundup Robot]

Roundup Robot added the comment:

New changeset cb7ca578a0c3 by Steve Dower in branch 'default':
Issue #23668: Regenerates posixmodule.c.h for new ifdefs
https://hg.python.org/cpython/rev/cb7ca578a0c3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23668>
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