Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to d72175c1e88052929dec9f59d5f620cc2d964cdd
  - Package management interface development
    
    Change-Id: I4e1cad1463eae8beb43760164cbe96733925a1da
    Issue-ID: USECASEUI-211
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed