Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[calipso] Create stable/fraser branch"
  - [calipso] Create stable/fraser branch

    Creating the fraser branch for Calipso at the request of the Release
    Manager.

    Change-Id: I6db89ccc5effef54e56afd267f4754641aff44a7
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4bf4e6d..a0e580f 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4bf4e6dda08986a70755f093dbbad09a995530a5
+Subproject commit a0e580fc58b41532937496267396de2b98994d85