Update git submodules

* Update docs/submodules/releng from branch 'master'
  to af641dcc16b6d7970831658aecfa4d6cce7ee136
  - Merge "Add Hunter jobs for SFC"
  - Add Hunter jobs for SFC

    remove gambia and add hunter jobs

    Change-Id: I5fa8f75f60d16dc41ff42a03e5d07fc63f49e8fe
    Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 56bf478..af641dc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 56bf478fece26fccd95fa28c6e48b8f5a040c9e0
+Subproject commit af641dcc16b6d7970831658aecfa4d6cce7ee136