docker: add docker-proxy
docker: add docker-proxy

Most (all) distros package docker-proxy along with the docker CLI
and daemon .. largely due to the fact that it is required to run
the docker registry.

docker-proxy is part of the libnetwork repository, so we add it to
the docker recipe as a separate git repo and integrate it into the
build and packaging process.

Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization