[issue45022] Update libffi to 3.4.2

[Ghostkeeper]

Ghostkeeper <rubend at tutanota.com> added the comment:

It seems this just broke our Windows build process of Python 3.8, since the cpython-bin-deps repository now contains only a libffi-8.lib while the the Python 3.8 branch still refers to libffi-7.lib in libffi.props: https://github.com/python/cpython/blob/5a42a49477cd601d67d81483f9589258dccb14b1/PCbuild/libffi.props#L13

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nosy: +Ghostkeeper

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45022>
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