Add change condition on for linting

We actually know that the file is not there because we just created a
new build directory but it's good style to add these things.

roles/deploy/tasks/deploy.yml

@@ -64,6 +64,7 @@
     "
   args:
     chdir: "{{ build_path }}"
+    creates: "{{ build_path }}/.bundle/config"
   become: true
   become_user: "{{ app_user }}"