swift

672612ff - [GSB] Cope with elided conformance requirements in concrete nested types.

[GSB] Cope with elided conformance requirements in concrete nested types. If we encounter an associated type reference within a concrete type, but haven't seen a specific protocol requirement, add the protocol conformance. Fixes rdar://problem/33139928 and another crasher. (cherry picked from commit 1c6c51d1374e96338ffeec0636a9d22603430af5)