Update git submodules

* Update docs/submodules/portal.git from branch 'master'
  to d21b976d5842c376d2deb8da5566e2278ae9dd87
  - Merge "Fix null pointer exception"
  - Fix null pointer exception
    
    +) Fix NPE
    ++) implement equals instead of ==
    
    Issue-ID: PORTAL-680
    Change-Id: I3a0df60b6171b114afc841b40838f6a4484370ee
    Signed-off-by: arind.mondal <arind.mondal@samsung.com>
    
1 file changed