Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: Copy XCI environment to deployment hosts

    The XCI hosts may need some of the XCI env variables to perform
    certain tasks so dump the XCI environment to /root/xci.env file and
    make that available to every host on the deployment.

    Change-Id: I286a01ca7da8ff206438c261798167f5e4daf7f2
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 5dcc328..cf894cb 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 5dcc328f7506166e049c0310d5d8f70fa4579d45
+Subproject commit cf894cbcffe0e1b2b28f6743e41407522cf20a63