[issue41164] allow python to build for macosx-11.0-arm64

[Lawrence D'Anna]

Change by Lawrence D'Anna <lawrence_danna at apple.com>:


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pull_requests: +20376
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/21224

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41164>
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