Update git submodules

* Update docs/submodules/multicloud/k8s.git from branch 'master'
  to d8763f3be65a55a10618385dd2aeea525a87707e
  - Updating virtlet version
    
    Change-Id: I39dec4a2dade465ea7cd561354724dd67cd28d20
    Signed-off-by: Akhila Kishore <akhila.kishore@intel.com>
    Issue-ID: MULTICLOUD-301
    
1 file changed