[unreal] copyright for StdFunctionConverter.hpp (#1678)

unreal/Puerts/Source/JsEnv/Public/StdFunctionConverter.hpp

@@ -1,3 +1,11 @@
+/*
+ * Tencent is pleased to support the open source community by making puerts available.
+ * Copyright (C) 2020 THL A29 Limited, a Tencent company.  All rights reserved.
+ * puerts is licensed under the BSD 3-Clause License, except for the third-party components listed in the file 'LICENSE' which may
+ * be subject to their corresponding license terms. This file is subject to the terms and conditions defined in file 'LICENSE',
+ * which is part of this source code package.
+ */
+#pragma once
 template <typename R, typename... Args>
 struct Converter<std::function<R(Args...)>>
 {