[issue35923] Update the BuiltinImporter in importlib to use loader._ORIGIN instead of a hardcoded value

[Dong-hee Na]

Change by Dong-hee Na <donghee.na92 at gmail.com>:


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versions: +Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35923>
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