Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Auto: Update daily job definition

    Add git-scm macro to auto daily job definition, so auto
    git repository is properly cloned into the WORKSPACE.

    Change-Id: I86377563e839b17cc2cdf15d84a19d4bc3e76237
    Signed-off-by: Martin Klozik <martin.klozik@tieto.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index fd1218e..8cf97f6 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit fd1218e578d0eefd8ea89b998380f98788d991bf
+Subproject commit 8cf97f6147b52f9faa4ffba723b5dbff39506b8c