Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix release tagging noop"
  - Fix release tagging noop

    When the release job runs to tag the repos it should push the tags back
    to Gerrit. This was originally a 'noop' for testing.

    Change-Id: Ifbecbccda1ae123c7b8f0d59eefa727784d10acd
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a9ac51e..ea6bc61 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a9ac51e26dcd61b905411d4abcb2c38e6d855d31
+Subproject commit ea6bc61f16d7fcbf1b6d33269d690fa349722d61