Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 7704a7556f9796f2a53990c101560c61046bdda7
  - Update view filter regexes (multi arch)

    Change-Id: Id0db3875a76d743bf53d03f6827b103eebb69359
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index b4f3dc6..7704a75 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit b4f3dc61c1de88b40cbf801626c7d784abfa2e9f
+Subproject commit 7704a7556f9796f2a53990c101560c61046bdda7