Update git submodules

Update git submodules

* Update docs/submodules/oom/offline-installer.git from branch 'master'
  to 76be40b0c8651b276ceed260936c6a8cf103520d
  - Merge "Adding Ubuntu support in Ansible - chrony role"
  - Adding Ubuntu support in Ansible - chrony role

    Extending ansible playbooks of ubuntu support.
    Change the order in role calls.
    Chrony role was moved due to its absence in Ubuntu distribution.
    Firstly is necessary to initialize package repository and after that install Chrony.

    Issue-ID: OOM-1671
    Signed-off-by: Jan Benedikt <j.benedikt@partner.samsung.com>
    Change-Id: Icadf8e106fba4a369148db0959dcac07a79257c2