API: output for [3rd-party] bundle-add

This commit provides a minimal output to be displayed when the --quiet
flag is used for these commands:

- swupd bundle-add
- swupd 3rd-party bundle-add

Signed-off-by: Castulo Martinez <castulo.martinez@intel.com>

test/functional/api/api-bundle-add.bats

@@ -0,0 +1,22 @@
+#!/usr/bin/env bats
+
+# Author: Castulo Martinez
+# Email: castulo.martinez@intel.com
+
+load "../testlib"
+
+test_setup() {
+
+	create_test_environment "$TEST_NAME"
+	create_bundle -n test-bundle1 -f /foo/file_1 "$TEST_NAME"
+
+}
+
+@test "API020: bundle-add" {
+
+	run sudo sh -c "$SWUPD bundle-add test-bundle1 $SWUPD_OPTS --quiet"
+
+	assert_status_is "$SWUPD_OK"
+	assert_output_is_empty
+
+}