Slava Pestov 4204e20508 RequirementMachine: Allow 'any C & P' to satisfy a superclass requirement 'C' if 'P' is an @objc protocol ...

The GenericSignatureBuilder did not actually allow this, but it's conflict
detection was imperfect so it did not flag the example in the radar;
variations on this code were rejected by the GenericSignatureBuilder.

Since the Requirement Machine finds all conflicts correctly, relax the
logic here to make this example work.

Fixes rdar://problem/91637621.

2022-04-12 16:43:56 -04:00

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