swift234

Revert the series of commits to remove redundantly-serialized
conformances (22195 to 22199).

It broke tests:

Failing Tests (4):
   Swift :: Interpreter/SDK/Foundation_NSString.swift
   Swift :: SIL/Serialization/deserialize_appkit.sil
   Swift :: SIL/Serialization/deserialize_foundation.sil
   Swift :: stdlib/NSStringAPI.swift

Swift SVN r22214