Update git submodules

* Update docs/submodules/releng from branch 'master'
  - bug-fix: ssl error for euphrates

    Change-Id: I0e7f9f502cd3844aacfdbc006a71a081b1c4fde4
    Signed-off-by: Gabriel Yu <Gabriel.yuyang@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 70dd6da..8009054 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 70dd6da73b294c7d395354bc21aa1cd4be4bc966
+Subproject commit 80090542b74e3140c0831386a8433cbb144c6ada