Update plugin to handle new style rules for virtual annotations.

tools/clang/plugins/tests/virtual_method_correct_annotation.cpp

Index: tools/clang/plugins/tests/virtual_method_correct_annotation.cpp
diff --git a/tools/clang/plugins/tests/virtual_method_correct_annotation.cpp b/tools/clang/plugins/tests/virtual_method_correct_annotation.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..79da2a3f412789dc694db97de3f7843aeb96fcad
--- /dev/null
+++ b/tools/clang/plugins/tests/virtual_method_correct_annotation.cpp
@@ -0,0 +1,11 @@
+class Base {
+ public:
+  virtual void F1() = 0;
+  virtual void F2() = 0;
+};
+
+class Derived : public Base {
+ public:
+  void F1() override {}
+  void F2() final {}
+};