Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Remove not consumed argument 'ARCH' from docker build

    Change-Id: I955479b8bc33c4a7445292901aa4228a413aa4c1
    Signed-off-by: Delia Popescu <delia.popescu@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 43a05d4..e25af7f 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 43a05d45f99d31c42a11578dce3f45c74745145d
+Subproject commit e25af7fd788db267247abb6b4efa4cf2dff73f32