Slava Pestov b6d8bbb698 AST: Return abstract conformance for UnresolvedType ...

We "fake" a conformance of UnresolvedType to any protocol.
Instead of returning a concrete conformance, return an
abstract conformance. The concrete conformance had several
problems leading to further crashes:

- The DC was set to a module, not a type declaration context,
  since there is not type declaration context here.

- The conformance was marked complete even though it was missing
  inherited conformances.

2017-01-04 00:10:28 -08:00

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