Update plugin to handle new style rules for virtual annotations.

tools/clang/plugins/tests/virtual_base_method_also_final.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#define VIRTUAL virtual
+#define VIRTUAL_VOID virtual void
+
+class A {
+ public:
+  VIRTUAL void F() final {}
+  // Make sure an out-of-place virtual doesn't cause an incorrect fixit removal
+  // to be emitted.
+  void VIRTUAL G() final {}
+  // Make sure a fixit removal isn't generated for macros that expand to more
+  // than just 'virtual'.
+  VIRTUAL_VOID H() final {}
+};