Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Use the recommended exception syntax

    Today I learnt that the use of except Exception, variable is not recommended
    anymore and it is not supported after python3. When using >=2.6, the syntax
    should be except Exception as variable.

    https://www.python.org/dev/peps/pep-3110/

    Change-Id: I213c220fc6e92878ffa4737efa16adb76ace1271
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 2bec71a..57e8255 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 2bec71a910fa21e2c6037b3cedfb0b9cf19329f1
+Subproject commit 57e82559f82e05d2cedf45e103d3dfce78592a64