Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Add Gerrit Trigger on Tag Creation"
  - Add Gerrit Trigger on Tag Creation

    We should be able to capture a tag creation event by triggering on
    'ref-updated' but looking specifically at the 'refs/tags/' branch
    prefix.

    Though this will trigger a build against a specific tag, scripts will
    still need to examine the GERRIT_REFSPEC to determine the tag name.

    Change-Id: Ic18a3e11530fb71735431240f93d2074dacf4e1c
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 115206f..24d66cb 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 115206f0a1a029f36e41610242648168c521d095
+Subproject commit 24d66cbb2c7974b021df04543e68963a7c5a20c5