Defer loading any pending update records until we've finished deserializing.
This fixes a bug where an update record causes us to load an entity that refers
to an entity we've not finished loading yet, resulting in badness.

llvm-svn: 207603
diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index 96253ca..5f1d65f 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -2801,7 +2801,7 @@
   assert(Idx == Record.size());
 
   // Load any relevant update records.
-  loadDeclUpdateRecords(ID, D);
+  PendingUpdateRecords.push_back(std::make_pair(ID, D));
 
   // Load the categories after recursive loading is finished.
   if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))