Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to f645188c3e3de65e41f6f5d53b3c3aca7d491770
  - Added interrupt method to notify caller method
    
    Called interrupt method on current thread
    
    Issue-ID: APPC-1437
    Change-Id: I0dbb8cf01f285c01f96fe4f1c0396999e3361373
    Signed-off-by: Jegadeesh Babu <jegabab1@in.ibm.com>
    
diff --git a/docs/submodules/appc.git b/docs/submodules/appc.git
index c36a770..f645188 160000
--- a/docs/submodules/appc.git
+++ b/docs/submodules/appc.git
@@ -1 +1 @@
-Subproject commit c36a7706f20773966b08e0a845e451e26097237d
+Subproject commit f645188c3e3de65e41f6f5d53b3c3aca7d491770