Update git submodules

* Update docs/submodules/releng from branch 'master'
  to cc3c6066326bd219d7c77162e46509f073c6b83d
  - Build functest-features in Hunter

    functest-features:hunter is not updated (latest Xtesting changes)

    Change-Id: Ic3b62c9b8e0b59a2127186bd5f38b7ca72cf2633
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ab244ae..cc3c606 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ab244ae7746a6a6d01d6abb7028a2a0c36c5c43a
+Subproject commit cc3c6066326bd219d7c77162e46509f073c6b83d