Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Enable post merge promotion for generic scenarios"
  - xci: Enable post merge promotion for generic scenarios

    Change-Id: Iacbd6515de08e77e3874354fc8e23a6cf8f7bf61
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 43734b6..f231407 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 43734b6f5e8ad8082ac50f31f043cf204362a02c
+Subproject commit f231407a590ec0351215312821b987fc63d54c60