Using podman-remote requires "varlink bridge"

And make the build more standardized, use the make target

Crio no longer includes a conmon binary

New major version of Buildroot, with new Linux kernel.
Both are LTS versions, and are supported until 2020.

Buildroot is upgraded from 2018.05 to 2019.02 LTS,
and Linux from 4.15 to 4.19 LTS as included in BR2.

Also upgrade VirtualBox to the supported 5.2 version
of the older branch, so that it will work everywhere.

Need to remove the legacy symlink for crio.sock from
the image, since it was causing build time issues...

It worked for go1.10, but not really for go1.11

Buildroot support the `_PKGDIR` variable to refer to the package
configuration directory. This means that we can replace all uses
of `BR2_EXTERNAL_MINIKUBE_PATH/package/foo` with `FOO_PKGDIR`.

Due to issues with grpc in the previous version,
when running kubernetes v1.16.0-rc.1 with cri-o.

Drop patch that has now been integrated upstream.

Give up on running crio-config, use pre-generated.

Issue #5191

The repository was moved to a separate organization

strings.ReplaceAll only work in go1.12, not go1.10

Need to create conmon/config.h without tags and git

The configuration _needs_ to be updated (yet again)

    runc v1.0.0-rc8-0-g425e105

    containerd v1.2.6

Static linking doesn't work with the systemd cgroup manager.

The latest docker package now uses the standard runc program.

We need this podman setting, as long as we're running from rootfs.

	no_pivot_root = true

Note that building uses a different way, an environment variable.

	export BUILDAH_NOPIVOT=true

Need a later version than the one provided by crio.

So use separate installations, one for each program.

Needed for doing "podman build" (uses buildah) when running on rootfs.

This environment variable has the same affect as DOCKER_RAMDISK does.