Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to e67def97e8ed4a84141a90fbcaa114391809bb82
  - Add release file for 1.6.1
    
    Change-Id: I19a543c1fea16823039d00290d4831dbeb35c1ea
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1686
    
1 file changed