Update git submodules

* Update docs/submodules/so/libs.git from branch 'master'
  to 6a15193837a3ba364797459f5ad4e2c85c85fb1b
  - fix global-jjb migration issue
    
    fix global-jjb migration issue
    - VNFSDK, SO
    
    Issue-ID: SO-1992
    Signed-off-by: sarada prasad sahoo <sarada.prasad.sahoo@huawei.com>
    Change-Id: Ibd4ffceecb0604267e5dc6721b38a8ea2adc4b48
    
1 file changed