Update git submodules

Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to d74d11086efae7deeeb7e8c37bf6dc287ee07e85
  - Use v1-standard-16 to build autorelease

    Autorelease needs 16G of RAM and 100 GB of disk in order to build
    so bump it to a standard vm flavor so that we can pick the
    appropriate disk size. We are not able to choose volume size with
    the Jenkins OpenStack cloud plugin and the performance flavor types.

    Change-Id: Ic7fb1e21ca7fe68b847d92c8bfb553db410f6634
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
    Signed-off-by: Anil Belur <abelur@linuxfoundation.org>