Some minor tweaks and additional tests for rvalue references

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67397 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx0x-rvalue-reference.cpp b/test/Parser/cxx0x-rvalue-reference.cpp
index 3643233..5736b79 100644
--- a/test/Parser/cxx0x-rvalue-reference.cpp
+++ b/test/Parser/cxx0x-rvalue-reference.cpp
@@ -3,4 +3,7 @@
 int && r1(int &&a);
 
 typedef int && R;
-void r2(const R a);
+void r2(const R a) {
+  int & &&ar = a; // expected-error{{'ar' declared as a reference to a reference}}
+}
+