Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to fc2018739d072a0287b84ff78c94572bce5aba7c
  - Fix escapeInternalJson method
    
    The method incorrectly handled cases where the json string contained
    json objects internally. These cases should be handled correctly now.
    
    Change-Id: I43b40414526bcb6577242ab737097dfb9119e618
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1576
    
1 file changed