Update git submodules

* Update docs/submodules/vfc/nfvo/driver/vnfm/svnfm.git from branch 'master'
  to 887f649cd3b44a1597d6219540ee3ff04d3f5046
  - fix serializer typo error

    zte vnfm driver serializer help text error

    Change-Id: Ia0582846b627611dc2d6ad4ffdb9ae08d5939abe
    Issue-ID: VFC-1405
    Signed-off-by: maopengzhang <zhang.maopeng1@zte.com.cn>

diff --git a/docs/submodules/vfc/nfvo/driver/vnfm/svnfm.git b/docs/submodules/vfc/nfvo/driver/vnfm/svnfm.git
index 045656e..887f649 160000 (submodule)
--- a/docs/submodules/vfc/nfvo/driver/vnfm/svnfm.git
+++ b/docs/submodules/vfc/nfvo/driver/vnfm/svnfm.git
@@ -1 +1 @@
-Subproject commit 045656e9d2178f5dfbc14061f4b3edd8e6d7fe1d
+Subproject commit 887f649cd3b44a1597d6219540ee3ff04d3f5046