chore: add license headers to Jetifier scripts

tools/jetifier-standalone/bin/jetifier-standalone

@@ -1,4 +1,17 @@
 #!/usr/bin/env sh
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 PRG="$0"
 while [ -h "$PRG" ] ; do
     ls=`ls -ld "$PRG"`

tools/jetifier-standalone/bin/jetifier-standalone.bat

@@ -1,3 +1,16 @@
+@rem Copyright 2015 the original author or authors.
+@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      https://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.
 @if "%DEBUG%" == "" @echo off
 if "%OS%"=="Windows_NT" setlocal
 set DIRNAME=%~dp0