Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Don't trigger danube branch"
  - Don't trigger danube branch

    create job for euphrates

    Change-Id: Ibabe87a6ba2e8c49356b33ed0b7ce7e93ab46df8
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5f4693d..c7c82f4 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5f4693d46da0599ce67eadeb1eedd311ebc27699
+Subproject commit c7c82f49e1af644542b2a5fbde8f870eee9c9ff5