components: use moby/moby instead of docker/engine

Since it was decided that github.com/moby/moby houses the release branches
of docker engine, maintaining two repos with release branches makes it
error-prone to manage, allowing for backports to slip by and git histories
to be inconsistent.

After this is merged and cherry-picked to other release branches on docker-ce
the plan is to archive the docker/engine repository.

Signed-off-by: Tibor Vass <[email protected]>

Author: Tibor Vass

components.conf

@@ -2,7 +2,7 @@
 	url = [email protected]:docker/docker-ce-packaging
 	branch = master
 [component "engine"]
-	url = [email protected]:docker/engine
+	url = [email protected]:moby/moby
 	branch = master
 [component "cli"]
 	url = [email protected]:docker/cli