carto/protobuf @ ruby-2.6-docker-image

Adam Cozzette 76d3961501 Cherry-picked some internal fixes from Google		%!s(int64=6) %!d(string=hai) anos
..
protobuf	76d3961501 Cherry-picked some internal fixes from Google	%!s(int64=6) %!d(string=hai) anos
__init__.py	786f80fe66 Add a modified patch from craigcitro@ to handle namespace sharing.	%!s(int64=9) %!d(string=hai) anos