Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: scripts: start-new-vm.sh: Skip all qcow2 files

    We may have qcow2 files around from previous deployments so make sure
    they are not copied to the newly created VM.

    Change-Id: I35a8d72355ffff4678b611e09aedc8667f29a7f1
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 9036d1c..d9f67fa 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 9036d1c5fde99a57c08528293784de653efab675
+Subproject commit d9f67fa7a9d1f9c9a28c9104974a5038d61f72b7