Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: xci: bifrost: Clone git repositories to $WORKSPACE"
  - jjb: xci: bifrost: Clone git repositories to $WORKSPACE

    Commit 0638af211db1 ("jjb: xci: xci-deploy.sh: Run the deployment
    script as normal user") dropped 'sudo' from the bifrost provisioning
    script. However this broke the jobs since the repositories were being
    cloned into /opt where the jenkins user has not access to. As such,
    clone the repositories in the $WORKSPACE directory instead.

    Fixes: 0638af211db1 ("jjb: xci: xci-deploy.sh: Run the deployment script as normal user")
    Change-Id: I55baceaada04496884470997562e3f512f2444a0
    Signed-off-by: Markos Chandras <mchandras@suse.de>