Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Update LaaS Docker Build Dockerfile Path

    The dockerfile path is relative to the dockerdir, not the root of the
    cloned repository.

    Change-Id: I7836abf8f15d4d9f14cb8d39bc951ec9341d39ba
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f3df2c4..06aa0ef 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f3df2c4b0fd8078b31b428665aaa73f133e6a9ac
+Subproject commit 06aa0efaad3854249c33d5c1ba4ae736fef90ce6