Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Fix symmetric testcase config

    One patch was merged without rebasing and it reverted some accepted changes

    Change-Id: Ia64cef60df1ceb72d8789d122cf1bbb820819aa2
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 0ca5bf6..77102ae 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 0ca5bf68cd801118ecc5df119bd07ed989a951a7
+Subproject commit 77102aeec40478c078acb616bf65c9d978572401