Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to e87aeb21d5966590edf5c75df3cda97512287be3
  - Release notes for Dublin
    
    Change-Id: Ie86561da472118d806117c71cb11879c687f5c80
    Issue-ID: SDC-2348
    Signed-off-by: Ofir Sonsino <os0695@intl.att.com>
    (cherry picked from commit 0c1c4c5a9d14c55ffdc8133cc120cb6aa8e54acc)
    
1 file changed