Add parsing of friend specifiers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71067 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/cxx-friend.cpp b/test/Parser/cxx-friend.cpp
new file mode 100644
index 0000000..5bfaf2f
--- /dev/null
+++ b/test/Parser/cxx-friend.cpp
@@ -0,0 +1,5 @@
+// RUN: clang-cc -fsyntax-only %s
+
+class C {
+  friend class D;
+};