Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: Vagrantfile: Switch off privilege mode

    The xci-deploy.sh script should not be run as root.

    Change-Id: I8d78d9df218508a72b6e419d16c95739fc1801e0
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index cd680ff..9c2b6ae 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit cd680ff04b2fb6afe3155fe9be02049f4464508a
+Subproject commit 9c2b6ae1f9eccec52c1a6e576e281606ea4a4936