Update reference comments for docker types origins
Update reference comments for docker types origins

Update comments which reference where the types in docker/types.go came
from to reflect renames of the upstream repositories.  The contents of
the types themselves, since they are encoded into images that are kept
on disk, shouldn't change often, if ever.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

Closes: #102
Approved by: rhatdan

TomSweeneyRedHat/buildah,rhatdan/buildah,nalind/buildah,nalind/buildah-1,rhatdan/buildah,TomSweeneyRedHat/buildah,ipbabble/buildah,rhatdan/buildah,projectatomic/buildah,nalind/buildah-1,nalind/buildah-1,TomSweeneyRedHat/buildah,nalind/buildah,projectatomic/buildah,projectatomic/buildah,ipbabble/buildah