Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Allow zte-virtual1 publish logs to artifact repo

    Change-Id: I0a8935351444909b13ed306baf4f36311c8186c9
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e5b452d..8d4256a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e5b452dfa55f8fb7a6bcc6895ae4c671b1c871cb
+Subproject commit 8d4256ad7c88d712e81a981e25dc3a9fd644d9ac