Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Use Global-JJB for Releng merge/verify Jobs

    Replaces the releng templates:

      - releng-verify-jjb
      - releng-merge-jjb

    With the job group '{project-name}-ci-jobs' which includes:

      - releng-jjb-verify
      - releng-jjb-merge
      - releng-jenkins-cfg-merge
      - releng-jjb-deploy

    JIRA: RELENG-397
    Change-Id: If8160a67d8d665dcb8f86b6649288a710cc0fe13
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 68a3a74..7bf9e57 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 68a3a74f28122922978c8042be6d799678fdc976
+Subproject commit 7bf9e576ff0fffdac04b5892e0e41b63c0735d4e