Switch diagnostic text from "C++0x" over to "C++11".

We'd also like for "C++11" or "c++11" to be used for the warning
groups, but without removing the old warning flags. Patches welcome;
I've run out of time to work on this today.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141801 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx-reference.cpp b/test/Parser/cxx-reference.cpp
index fae938b..d21412c 100644
--- a/test/Parser/cxx-reference.cpp
+++ b/test/Parser/cxx-reference.cpp
@@ -18,4 +18,4 @@
 int & const volatile Z = val; /* expected-error {{'const' qualifier may not be applied}} \
                            expected-error {{'volatile' qualifier may not be applied}} */
 
-typedef int && RV; // expected-warning {{rvalue references are a C++0x extension}}
+typedef int && RV; // expected-warning {{rvalue references are a C++11 extension}}