Copyright for golang-google-protobuf source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: protobuf-go
Source: https://github.com/protocolbuffers/protobuf-go

Files: *
Copyright: 2018-2020 The Go Authors
License: BSD-3-clause

Files: debian/*
Copyright: 2020 Shengjing Zhu 
License: BSD-3-clause
Comment: Debian packaging is licensed under the same terms as upstream

Files: internal/testprotos/benchmarks/benchmarks.pb.go
       internal/testprotos/benchmarks/datasets/*
       internal/testprotos/conformance/*
       types/descriptorpb/*
       types/known/*
       types/pluginpb/*
Copyright: 2008 Google Inc
License: BSD-3-clause

License: BSD-3-clause
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 .
    * Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above
 copyright notice, this list of conditions and the following disclaimer
 in the documentation and/or other materials provided with the
 distribution.
    * Neither the name of Google Inc. nor the names of its
 contributors may be used to endorse or promote products derived from
 this software without specific prior written permission.
 .
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