Basic support for Microsoft property declarations and
references thereto.

Patch by Tong Shen!

llvm-svn: 179585
diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index 0f4881e..0edad3e 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -2394,6 +2394,7 @@
   case Expr::ImplicitValueInitExprClass:
   case Expr::ParenListExprClass:
   case Expr::LambdaExprClass:
+  case Expr::MSPropertyRefExprClass:
     llvm_unreachable("unexpected statement kind");
 
   // FIXME: invent manglings for all these.