containers/storage and storage.conf now support flags to allow users
to setup containers/storage to run on devicemapper.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Re-vendor containers/storage to current revision
0d32dfce498e06c132c60dac945081bf44c22464, and containers/image to
current revision c8bcd6aa11c62637c5a7da1420f43dd6a15f0e8d.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>