Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fraser 6.0.0 tag"
  - Fraser 6.0.0 tag

    I have tagged your repo for you at the head of the
    fraser branch

    Please let us know if this is correct.
    If I dont hear back from you I will merge this and tag your repo
    at this location

    Change-Id: I9223da8139ce997e6b7dde9db30a875324c0b94f
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5c44c0e..1d40c97 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5c44c0e6f05cafdcec73996bd26ebee5913d4cfe
+Subproject commit 1d40c970bc596741a78d4e91d8a7decec86cd8b6