For hybrid cloud, some ubuntu vm images doesn't have the directory
`/etc/apt/sources.list.d` which cause failure on creating
`/etc/apt/sources.list.d/docker.list`.
To fix this issue, create this directory first (if it doesn't exist).
Signed-off-by: Penghan Wang <ph.wang@daocloud.io>
Upstream-commit: 80e90499aafabb27c68a2ddca31339aa125c40ae
Component: engine