Upgrade buildifier to 0.15.0

Change-Id: Idcc014350fe81f6ffc1be14e2ff55f799b13ec7c
1 file changed
tree: 0653465616c1ecff95df0061c1069a196b08ed40
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore