Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: playbooks: Copy local changes to scenarios"
  - xci: playbooks: Copy local changes to scenarios

    Make sure that any local changes to scenarios are being propagated to
    the checkouts. This should only happen when we are testing the 'master'
    branch of the scenario since it may be desirable to test a specific SHA
    in which case we shouldn't modify the checkout code.

    Change-Id: I4197f09a3e4d5a54c86905bc556b06e08948fbc2
    Signed-off-by: Markos Chandras <mchandras@suse.de>