Add ensure-genmanifest role

Change-Id: Ifebf9da8cd8eeaa9cec621e490064a0f935ddbe0
diff --git a/zuul.d/test-jobs.yaml b/zuul.d/test-jobs.yaml
index b7d3a37..723283e 100644
--- a/zuul.d/test-jobs.yaml
+++ b/zuul.d/test-jobs.yaml
@@ -11,3 +11,9 @@
     run: playbooks/test-install-build-essential.yaml
     files:
       - roles/install-build-essential/.*
+
+- job:
+    name: test-ensure-genmanifest
+    run: playbooks/test-ensure-genmanifest.yaml
+    files:
+      - roles/ensure-genmanifest/.*