Init and update submodules before building

Plugins may need to refer to other existing core
Gerrit plugins and thus would need their source
code available.

Change-Id: Ib224f4964bd1a495db7bf295ff88fb4b82806e59
3 files changed
tree: f095d0933aa2532368a2df0848e24f2f83a2e072
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore