Update git submodules

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

    Change-Id: I21c5ab27243bd50dee76d8b10c10ae0fb8aa5f1d
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f445cb5..c362875 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f445cb5b0d6d31402bb9b986ec20ea888a3a6fc6
+Subproject commit c362875ea56b5dc1cacc69059e199d74668feeb5