Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "create stable/fraser branch for nfvbench"
  - create stable/fraser branch for nfvbench

    Change-Id: Ide00a91274057611ce1e21a8c146ad26c9ba3aae
    Signed-off-by: ahothan <ahothan@cisco.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4ca316c..92af777 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4ca316cdb4c93a1cb843a804e3be00e635964f16
+Subproject commit 92af7777ef51f8e8fe6164a27d2f69a75266dc0f