Add __nullptr as a C++0x nullptr literal, available in C++98

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118482 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/nullptr-98.cpp b/test/SemaCXX/nullptr-98.cpp
new file mode 100644
index 0000000..0d624c2
--- /dev/null
+++ b/test/SemaCXX/nullptr-98.cpp
@@ -0,0 +1,3 @@
+// RUN: %clang_cc1 -std=c++98 -fsyntax-only -verify %s
+void f(void *);
+void g() { f(__nullptr); }