Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 15ada30d45e3e0db068e54e38c99f40b2c2a9e8f
  - Automation adds index.rst
    
    Issue-ID: CIMAN-376
    
    Change-Id: I6b9df89424fcb6ad0cbdbe6631b4514f20edf57a
    Signed-off-by: lf-jobbuilder <releng+lf-jobbuilder@linuxfoundation.org>
    
1 file changed