Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 1b6adf74f6a436978a8afd8c68a453bde9956589
  - Add source support
    
    Change-Id: I71f578764f666dd33c4aa42c7e8613b58ecb2f93
    Issue-ID: SDC-2173
    Signed-off-by: bilal.iqbal <bilal.iqbal@est.tech>
    
1 file changed