[Bug 51918] New: wine-gecko 2.47.2 fails to build on host systems with python 3.10

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51918

Bug ID: 51918
           Summary: wine-gecko 2.47.2 fails to build on host systems with
                    python 3.10
           Product: Wine-gecko
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-gecko-unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 70873
  --> https://bugs.winehq.org/attachment.cgi?id=70873
Python-3.10 fixes for wine-gecko 2.47.2

Successor of https://bugs.winehq.org/show_bug.cgi?id=49126

Another round of fixes are needed so that wine-gecko 2.47.2 builds with
python-3.10 (present in e.g. the upcoming Fedora 35)

Attached is a patch with some fixes until I got stuck due to a limited amount
of pyFoo. I'll be happy to test a tree with fixes.

Fedora bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=1987713