grpc-httpjson-transcoding-20190920-bp154.1.20

- Remove all subpackages except source - envoy-proxy needs the
  whole source tree instead of a library and there is no other
  consumer of grpc-httpjson-transcoding.

- Update to version 20190920:
  * Changed return of ByteCount() to use plain int64_t.
  * Relax Base64 Decoding Strict decoding breaks Base64 MIME encodings, which place newlines after a certain number of spaces. MIME encoding is commonly used by Java Clients.
  * Update googleapis and protobuf
  * Run clang-format
  * Make path matcher utility compilable with gcc 4.9
  * Replace std::set with std::unordered_set in path matcher utility
  * Make path_matcher.h compile with gcc 4.9
  * Replace std::set with std::unordered_set in path matcher
  * Replace a single character string literal with a character
- Add patch which fixes the build with newer googleapis:
  * 0001-bazel-Update-googleapis-and-do-not-define-custom-BUI.patch

- Add source package, which is needed to fix envoy-proxy.
  (boo#1129568)

- Add soname to all *.so* files.

- Adjust to downgraded version of googleapis.

- Update descriptions.

- Update to version 20181128:
  * bazel: Allow to distdir all dependencies
  * travis: Update Bazel version to 0.19.2

- Initial release - 20180530