Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to c78692e297c0127474d2af000f22316638991c1e
  - Add null test to test in `UpgradeBusinessLogic`
    
    Issue-ID: SDC-2915
    Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
    Change-Id: I4e6f27b707b1bdbbecf9a97606c9a655d834fe56
    
1 file changed