Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Remove euphrates jobs"
  - Remove euphrates jobs

    Change-Id: Idbe3be3da5ddf0fb9b1649002d7cf6bd8babc817
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 62f14a6..eceb323 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 62f14a6f19be241f0f4bd6634214eba0ccc8905a
+Subproject commit eceb32353cf400e52a13d35ecb5987ba94341872