Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Create Dovetail Fraser Jobs"
  - Create Dovetail Fraser Jobs

    These are replacing the current Euphrates jobs.

    Change-Id: I6d7bf1490c1dd46f80ac5b14449abb6f287e5acf
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8c2c68b..8bc82a7 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8c2c68b9704620d7d5fb7f03eda4fe68df4cbbf7
+Subproject commit 8bc82a7f6b26fffa111985dca4aef4273f6a5408