Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Track the indirectly created security groups

    networking-odl creates a security group when creating a router. This
    security group is not tracked by SNAPs and thus it never gets removed
    when running the clean up. We need this workaround until the following
    bug is fixed:

    https://bugs.launchpad.net/networking-odl/+bug/1763705

    Change-Id: I15b939609e815f24ef0c1dcc0aeb9f4471f351f0
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 31177af..9fc4127 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 31177afd6821f65e2601cb2b928624ba8f3d0216
+Subproject commit 9fc412714c038f69f959105e1f5dc8e8a670d0b9