Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Fix Security Scan Shortlog Format

    The current Anteater shortlog output still contains single and double
    quotes, causing comments to not be posted to Gerrit. So instead of
    trying to escape the quotations they should be removed entirely.

    JIRA: RELENG-272

    Change-Id: I8a2565c85763d7617ced73702a12e28bf634678a
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4f8a917..ef67794 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4f8a9174c39a1590652a08d5a7ec8f1d9fea8401
+Subproject commit ef6779412aca08e15b6172468d712d32110857b6