Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: Ensure we are in the root directory for bug reports"
  - xci: Ensure we are in the root directory for bug reports

    During the XCI deployment we change directories in too many places. As a
    result of which, when something breaks, we may be outside the releng-xci
    checkout directory so we need to enter it again for all the git commands
    to work.

    Change-Id: I6adcff396fc5d7cce8bb07353dec26b76b1825a4
    Signed-off-by: Markos Chandras <mchandras@suse.de>