Update git submodules

* Update docs/submodules/oom.git from branch 'master'
  to a538d8535a3928a9a3077f4160fec8d979a14cab
  - update vfc image version
    
    Issue-ID: VFC-1373
    Change-Id: Ia232ab4ab7b3fdddeb7777d2f756cc62f1f01410
    Signed-off-by: yangyan <yangyanyj@chinamobile.com>
    
diff --git a/docs/submodules/oom.git b/docs/submodules/oom.git
index 30e72f9..a538d85 160000
--- a/docs/submodules/oom.git
+++ b/docs/submodules/oom.git
@@ -1 +1 @@
-Subproject commit 30e72f97619c648831c052c4b6851b44b1d3a1e8
+Subproject commit a538d8535a3928a9a3077f4160fec8d979a14cab