Create the initial recipe to provide crun as an alternative OCI runtime
provider.
This currently has a depdenency on seccomp, but it would be nice if we
can make that optional in the future to avoid pulling in all of
meta-security as a dependency.
Example:
% skopeo copy docker://busybox oci:busybox-oci:latest
% mkdir busybox-bundle
% oci-image-tool create --ref platform.os=linux busybox-oci busybox-bundle
% cd busybox-bundle/
% rm config.json
% runc spec
% runc run foo
^D
% crun run foo
^D
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
