Update git submodules

* Update docs/submodules/clamp.git from branch 'master'
  to 7d277f0b30cd35b7e8d758863c8cc9eadb62eecd
  - Fix start-backend script
    
    Just ensure the log folder is well there before starting the backend
    
    Issue-ID: CLAMP-535
    Change-Id: I355ecba7dad0fa6f272a69ad6c89c422b6551094
    Signed-off-by: sebdet <sebastien.determe@intl.att.com>
    
diff --git a/docs/submodules/clamp.git b/docs/submodules/clamp.git
index 4d9ba45..7d277f0 160000
--- a/docs/submodules/clamp.git
+++ b/docs/submodules/clamp.git
@@ -1 +1 @@
-Subproject commit 4d9ba45b3ef8bae54b489d5bf6cfa07e9675bbd6
+Subproject commit 7d277f0b30cd35b7e8d758863c8cc9eadb62eecd