These are tests that fail in the next commit without this flag. This
does not add -verify-ignore-unrelated to all tests with -verify, only
the ones that would fail without it. This is NFC since this flag is
currently a no-op.
This can be used as QoI for things like 'NSASCIIStringEncoding', which
is going to canonically be `String.Encoding.ascii` if/when SE-0086 is
accepted.
We can't actually handle this in NS_SWIFT_NAME (that is, we can't
/import/ something onto a nested type), but that's okay: we already
have stricter limitations on NS_SWIFT_NAME enforced by Clang.
rdar://problem/26352374
Most cases fall out from swift_name validation on the Clang side dropping invalid API notes, though the validation on the Clang side is conservative and misses some cases. We still have Swift-side work to fall back to the original name here.
