Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Set the lint job shell to /bin/bash

    The default builder in Jenkins is '/bin/sh -ex'. Because of this lint
    jobs are failing that we assume won't as everywhere else we've used
    /bin/bash and explitily set options when needed.

    Explicitly setting these jobs to use /bin/bash should keep Jenkins from
    failing builds without reporting the lint results.

    Change-Id: Ibe6cad979d6dcf30e7991873c9ac446ae3bf3a8b
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>