Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Comment Pending JJB Changes on Patchset"
  - Comment Pending JJB Changes on Patchset

    Each time a patchset is created that has an effect on Jenkins jobs, a
    non-voting job will trigger that comments to Gerrit which jobs are
    added, modified, or deleted.

    This should help developers judge the overall impact an individual
    patchset may have on Jenkins since JJB macros can be expanded to
    any number of jobs.

    Change-Id: I99f9b68bc7933abfa39a941d6e65a73f62e58e56
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index dd6044f..3d34691 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit dd6044fb585c7dcdfd231b3fe5c25c0df3b7d5d3
+Subproject commit 3d34691287f0efd7361cc35f9a7cbe4e27f0b5f6