Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "KVMFORNFV: Common build packages for daily test cases"
  - KVMFORNFV: Common build packages for daily test cases

    This patch is used to implement the common daily build job so that
    both the kvmfornfv cyclictest and packet forwarding test cases will
    download the same artifacts uploaded by the daily build job for
    testing on the test pod.

    Change-Id: Ifbe3ab1d6c62bd73c982065242cbfe29ce5dea1e
    Signed-off-by: Gundarapu Kalyan Reddy <reddyx.gundarapu@intel.com>