Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 3cdd515788e42ae60ec2dc05340c2494261288d3
  - Improve unit tests for ESTimeBasedEvent
    
    Issue-ID: SDC-2327
    Signed-off-by: Marcin Kowalski <m.kowalski3@partner.samsung.com>
    Change-Id: I4e53f5f4cf14c5b44d72b10de53e5641e75a98b1
    
1 file changed