[issue31691] Include missing info on required build steps and how to build installer

[Ivan Pozdeev]

Change by Ivan Pozdeev <ivan_pozdeev at mail.ru>:


Added file: https://bugs.python.org/file47192/0001-Add-missing-build-steps-in-build-procedure.patch

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31691>
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