Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "fuel: s/danube/euphrates/, disable triggers"
  - fuel: s/danube/euphrates/, disable triggers

    While at it, also rename some leftover "danube" reference for
    the armband project.

    Change-Id: Icddcf19ca9dfd7880ae2f78ed690988bded25abd
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 68195fd..1b435e0 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 68195fd98e2633049858eef179231a5ba13980ce
+Subproject commit 1b435e0d487ff28f487c52bcbd17f2ed1f9358e5