Merge component 'engine' from git@github.com:moby/moby 19.03

Author: GordonTheTurtle

components/engine/hack/dockerfile/install/containerd.installer

@@ -4,7 +4,7 @@
 # containerd is also pinned in vendor.conf. When updating the binary
 # version you may also need to update the vendor version to pick up bug
 # fixes or new APIs.
-: "${CONTAINERD_COMMIT:=8fba4e9a7d01810a393d5d25a3621dc101981175}" # v1.3.7
+: "${CONTAINERD_COMMIT:=ea765aba0d05254012b0b9e595e995c09186427f}" # v1.3.9
 
 install_containerd() {
 	echo "Install containerd version $CONTAINERD_COMMIT"