Introduce ObjCInterfaceLoc which provides type source information for ObjC interfaces.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83097 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/PCHWriterDecl.cpp b/lib/Frontend/PCHWriterDecl.cpp
index 7a8f3e8..9573d43 100644
--- a/lib/Frontend/PCHWriterDecl.cpp
+++ b/lib/Frontend/PCHWriterDecl.cpp
@@ -177,6 +177,9 @@
 void TypeLocWriter::VisitTypedefLoc(TypedefLoc TyLoc) {
   Writer.AddSourceLocation(TyLoc.getNameLoc(), Record);
 }
+void TypeLocWriter::VisitObjCInterfaceLoc(ObjCInterfaceLoc TyLoc) {
+  Writer.AddSourceLocation(TyLoc.getNameLoc(), Record);
+}
 void TypeLocWriter::VisitObjCProtocolListLoc(ObjCProtocolListLoc TyLoc) {
   Writer.AddSourceLocation(TyLoc.getLAngleLoc(), Record);
   Writer.AddSourceLocation(TyLoc.getRAngleLoc(), Record);