Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "yardstick: enable euphrates docker"
  - yardstick: enable euphrates docker

    Change-Id: I745287911eab7414adccd99e9e2385bf5b7438f7
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 67dafae..5861b6a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 67dafae3825fa4c685f5dd9b4f172e305c4a514d
+Subproject commit 5861b6a705f3fbe3439c22a6aaac5197f92ceae4