Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Update the docs/development directory

    MS6 requires to have the docs directory structure ready and a preliminary
    versio of the documents inside it.

    - Moved requirements file to the requirements folder
    - Removed the NSH workaround info as we don't need it anymore
    - Added some new requirements

    Change-Id: Icca89c738b1eb1865adff510ca2850c592c7a14a
    Signed-off-by: Manuel Buil <mbuil@suse.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index 221fd4c..797f915 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit 221fd4cfd7f86e110b3536066ede2910191dfc1e
+Subproject commit 797f9156bfe3fbbf6fb68b62b906799484d4bbc6