[issue30638] Additional dependencies and rule for `make regen-all`

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> I don't think that we want `make regen-all` to require internet access.

Agree. I mentioned it only because these files also are generated.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30638>
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