Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 53b2cd5dfa6ac462e339f4fb00e9beceebc1c8f0
  - remove license issues
    
    Issue-ID: SO-2446
    
    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I00d93bf488f813d6bae1f254411960746dff0a34
    
1 file changed