Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 314bba3a72c1b1122668950005a2e754f8c5c5cc
  - Created new BB for so-etsi
    
    Change-Id: I9bf6b4019c280b816925ee5e0d826bff69cb1583
    Issue-ID: SO-1621
    Signed-off-by: waqas.ikram <waqas.ikram@est.tech>
    
1 file changed