Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [barometer] Create stable/gambia jobs for Barometer

    Change-Id: I71a3ed0c242554cc685f4a610c3651d1e2cab98f
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d428147..9b7568c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d428147680957f31c43983a3a4e50842e17aa12c
+Subproject commit 9b7568cbcd5a1decc0f3d64e3bdc6b6347bb5c3d