Copyright for tkrzw-python source package in Oracular

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: tkrzw-python
Source: https://dbmx.net/tkrzw/pkg-python/

Files: *
Copyright: 2020 Google LLC
License: Apache-2.0

Files: debian/*
Copyright: 2021 Boyuan Yang 
License: CC0-1.0

License: CC0-1.0
 On Debian systems, the complete text of the CC0-1.0
 license can be found in "/usr/share/common-licenses/CC0-1.0".

License: Apache-2.0
 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
 http://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.
 .
 On Debian systems, the complete text of the Apache version 2.0
 license can be found in "/usr/share/common-licenses/Apache-2.0".