Update git submodules

* Update docs/submodules/vfc/nfvo/lcm.git from branch 'master'
  to 21cc2c63ba04dc1a00233e7ed6ae47e1a974c795
  - add more docutment in lcm
    
    Change-Id: Iba68f049d7e02f533593403980fe7fcbce1cd592
    Issue-ID: VFC-1337
    Signed-off-by: liuyuan <liuyuanyjy@chinamobile.com>
    
diff --git a/docs/submodules/vfc/nfvo/lcm.git b/docs/submodules/vfc/nfvo/lcm.git
index 96c9717..21cc2c6 160000
--- a/docs/submodules/vfc/nfvo/lcm.git
+++ b/docs/submodules/vfc/nfvo/lcm.git
@@ -1 +1 @@
-Subproject commit 96c9717609b3227d183839ab0f3647a35ee772e8
+Subproject commit 21cc2c63ba04dc1a00233e7ed6ae47e1a974c795