Put back the flags field in the constant CF string type.

llvm-svn: 44222
diff --git a/clang/test/CodeGen/cfstring.c b/clang/test/CodeGen/cfstring.c
new file mode 100644
index 0000000..c7df1b3
--- /dev/null
+++ b/clang/test/CodeGen/cfstring.c
@@ -0,0 +1,6 @@
+// RUN: clang -emit-llvm %s
+#define CFSTR __builtin___CFStringMakeConstantString
+
+void f() {
+  CFSTR("Hello, World!");
+}
\ No newline at end of file