Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Clean Anteater Weekly Workspace after Emailing PTL"
  - Clean Anteater Weekly Workspace after Emailing PTL

    The workspace is cleaned immediately after anteater is ran. This removes
    the securityaudit.log which the emails to PTLs should contain.

    Change-Id: I0afa4c69035e411aebe7cfea625ebafe5796d236
    Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index ef89690..70e485e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit ef89690c70e6bd0671ead70d31f2c94bc10edcc3
+Subproject commit 70e485e95938adf04adeb9338fa2ea46fb167781