Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: playbooks: Copy local changes to scenarios"
  - xci: playbooks: Copy local changes to scenarios

    Make sure that any local changes to scenarios are being propagated to
    the checkouts. This should only happen when we are testing the 'master'
    branch of the scenario since it may be desirable to test a specific SHA
    in which case we shouldn't modify the checkout code.

    Change-Id: I4197f09a3e4d5a54c86905bc556b06e08948fbc2
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 262a6af..b6907b8 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 262a6af98433ff795d7cfa6833828f61e7876387
+Subproject commit b6907b858e215f358a16216a5095c9c6ed3520c4