Dockerfile: Install a fixed version of gogoprotobuf
Dockerfile: Install a fixed version of gogoprotobuf

This avoids build failures when gogoprotobuf is changed upstream.

Signed-off-by: Euan Harris <c3b6e83069c8e9e3af49a38fec6026be89559638@docker.com>

medallia/libnetwork,medallia/libnetwork,mahak/libnetwork,docker/libnetwork,docker/libnetwork,medallia/libnetwork,mahak/libnetwork,docker/libnetwork,mahak/libnetwork