Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 12094d52d537c43c2d8d4d875dd84ba1ec7e8c7a
  - Set appc parent 2.6.2
    
    Change-Id: I4d3fe28ac744a62b448816fe14b645f19a3e5209
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1735
    
1 file changed