Enable Ubuntu Focal in Jenkinsfile

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit f1a0fdb)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 1d692ac4f41fb1340a6534f8fb32c8573713b36b
Component: packaging

Author: thaJeztah

components/packaging/Jenkinsfile

@@ -4,15 +4,15 @@ def branch = env.CHANGE_TARGET ?: env.BRANCH_NAME
 
 test_steps = [
 	'deb': { ->
-		stage('Ubuntu Xenial Debian Package') {
+		stage('Ubuntu Xenial and Focal Package') {
 			wrappedNode(label: 'ubuntu && x86_64', cleanWorkspace: true) {
 				try {
 					checkout scm
 					sh('git clone https://github.com/docker/cli.git')
 					sh("git -C cli checkout $branch")
 					sh('git clone https://github.com/docker/engine.git')
 					sh("git -C engine checkout $branch")
-					sh('make -C deb VERSION=0.0.1-dev ENGINE_DIR=$(pwd)/engine CLI_DIR=$(pwd)/cli ubuntu-xenial')
+					sh('make -C deb VERSION=0.0.1-dev ENGINE_DIR=$(pwd)/engine CLI_DIR=$(pwd)/cli ubuntu-xenial ubuntu-focal')
 				} finally {
 					sh('make ENGINE_DIR=$(pwd)/engine clean-engine')
 				}