[libclang] Add a libclang test I neglected to commit.

llvm-svn: 150193
diff --git a/clang/test/Index/index-suppress-refs.hpp b/clang/test/Index/index-suppress-refs.hpp
new file mode 100644
index 0000000..4aab08b
--- /dev/null
+++ b/clang/test/Index/index-suppress-refs.hpp
@@ -0,0 +1,3 @@
+
+class B1 {};
+class B2 {};