Update copyrights in CLI scripts

compiler/cli/bin/kotlin.bat

@@ -1,18 +1,7 @@
 @echo off
 
-rem Copyright 2010-2015 JetBrains s.r.o.
-rem
-rem Licensed under the Apache License, Version 2.0 (the "License");
-rem you may not use this file except in compliance with the License.
-rem You may obtain a copy of the License at
-rem
-rem http://www.apache.org/licenses/LICENSE-2.0
-rem
-rem Unless required by applicable law or agreed to in writing, software
-rem distributed under the License is distributed on an "AS IS" BASIS,
-rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-rem See the License for the specific language governing permissions and
-rem limitations under the License.
+rem Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+rem Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 
 setlocal
 set _KOTLIN_RUNNER=1