Added serialization of Union decls.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44133 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/DeclSerialization.cpp b/AST/DeclSerialization.cpp
index 51c93fb..555c33e 100644
--- a/AST/DeclSerialization.cpp
+++ b/AST/DeclSerialization.cpp
@@ -60,7 +60,8 @@
       
     case Function:
       return FunctionDecl::CreateImpl(D);
-      
+     
+    case Union:
     case Struct:
       return RecordDecl::CreateImpl(k,D);