Also add new dependencies on github.com/xeipuuv/gojson* (brought up by
new runtime-tools) and adapt the containerd/cri code to replace the APIs
that were removed by runtime-tools.
In particular, add new helpers to handle the capabilities, since
runtime-tools now split them into separate sets of functions for each
capability set.
Replace g.Spec() with g.Config since g.Spec() has been deprecated in the
runtime-tools API.
Signed-off-by: Filipe Brandenburger <filbranden@google.com>
