Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: Switch default CPU model to 'host-model'"
  - xci: Switch default CPU model to 'host-model'

    From upstream docs:

    'The host-model mode is essentially a shortcut to copying host CPU
    definition from capabilities XML into domain XML. Since the CPU
    definition is copied just before starting a domain, exactly the
    same XML can be used on different hosts while still providing
    the best guest CPU each host supports'

    It's probably safer to use that instead of 'host-passthrough' so
    we can get a CPU (both for main VM and the nested ones) that libvirt
    understands. Moreover, it's important to present a CPU that the
    guest OS understands as well.

    Change-Id: I25a8ff0e8635df9804c793d184f048cc86059ce0
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index c5c2f18..03f3dc9 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit c5c2f187ff01384e8b9ef323fb5602dcb7154d15
+Subproject commit 03f3dc9a997c5ac7041631de013aeeaebd43faa0