Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to a0c771eb01a35f907394582f3febb42d39f25799
  - Change parent version to snapshot

    Changing the parent version to snapshot in order to
    build with the new version of appc parent which has
    the Fluorine SR2 ccsdk parent poms.

    Change-Id: I03d9a0d38b6d97bab17cd887562ae42ed1b19611
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1630

diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index 1a98883..a0c771e 160000 (submodule)
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit 1a98883624408440ed71c3ec7ef2cb63f7b8b2d7
+Subproject commit a0c771eb01a35f907394582f3febb42d39f25799