Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: Add missing update_cache statements

    When we install packages from the distro repos we need to make sure
    that the database is updated. This also takes SUSE's zypper pkg manager
    into consideration which can benefit from the same Ansible option.

    Change-Id: I7a2206bfc5827b9ccb448278759711c560bb4679
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 348bb6a..f5c5e11 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 348bb6a8cea2b12ceca8941fa46e8290b18f0a55
+Subproject commit f5c5e11581e17919602fcc08a022ca190be2e18e