Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 8fda37850448fc0bef11468aee79da0d9b8c9e81
  - update release note for Frankfurt
    
    APPC release note updated
    for Frankfurt release
    
    Issue-ID: APPC-1880
    Change-Id: I1bff2a6f8f2d6f032033fb80ccc22796be608823
    Signed-off-by: Taka Cho <takamune.cho@att.com>
    
1 file changed