Fix a typo in the diagnostic note added in r186342.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186348 91177308-0d34-0410-b5e6-96231b3b80d8
ObjC migrator: finding conforming protocol
candidates for each class. wip.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186349 91177308-0d34-0410-b5e6-96231b3b80d8
Test case for r18266 (serialization support for TagDecl:IsCompleteDefinitionRequired)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186351 91177308-0d34-0410-b5e6-96231b3b80d8