QGIS/external/mapbox-vector-tile

The .pb.cc and .pb.h are generated by 'protoc' tool and got copied here from https://github.com/TimSC/mbtiles-cpp

Update pbf files

To update the protobuf files, get vector_tile.proto from https://github.com/mapbox/vector-tile-spec, remove the line "option optimize_for = LITE_RUNTIME;", then

mkdir vector_tile21

protoc vector_tile.proto --cpp_out vector_tile21

protobuf lite is avoided because it doesn't contain SerializeToOstream functionality.