[issue45022] Update libffi to 3.4.2

[Zachary Ware]

Zachary Ware <zachary.ware at gmail.com> added the comment:

The 3.8 branch has been updated to point to the `libffi-3.3.0` tag; you can either update to the latest revision of 3.8 or pull in just 8c3a10e58b12608c3759fee684e7aa399facae2a

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