Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Initial Release files from Euphrates Release"
  - Initial Release files from Euphrates Release

    These files normally contain the start point of the stable/release branch,
    but as this is the initial setup starting from the previous release,
    they contain the tip of the stable branch.

    When a project is ready to being the stable branch process, they will
    copy their project's release file and modify the 'branches' mapping to
    create their stable branch.

    Change-Id: I0244da5eeb94c431d83f217ec07b08553fdf0639
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3646493..44af730 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 36464933ed4ccd7336b1ae315ca1b5d1f9a82527
+Subproject commit 44af730357e1bebb9490138970aafbd1bdd2dcbd