Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Do not clone and checkout scenario repo if it is releng-xci

    Change-Id: I48cdbfbd5b7746e75565d318616e9c580b5ba156
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index bf5f869..ada5d63 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit bf5f869a57d97b32ff72b252a397cf686e376979
+Subproject commit ada5d633f98568cea1621d4fa1067ff2d3aed753