Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to b0bc41c4d4595bf661123ba06290daa6d77b1239
  - Added Null check
    
    Code to avoid null pointer Exception
    
    Issue-ID: APPC-1451
    Change-Id: I5e2324a2ddffbc50251ee93a1278cfb68e62a551
    Signed-off-by: Jegadeesh Babu <jegabab1@in.ibm.com>
    
1 file changed