Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: provision-vm-nodes: Use sudo to remove the XCI directory"
  - xci: provision-vm-nodes: Use sudo to remove the XCI directory

    Since I00d77e1fc62cccda7920af3469af9d44247780f4 the entire XCI_DEVEL_ROOT
    is being removed. However, some of the files are owned by root so we
    need elevated privileges to remove these files and directories

    Change-Id: Ie10018ded198b922077e38fa5776fca098418192
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 2c63c22..9b0b4e1 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 2c63c226780d9626ec3dce4b7e16b84815baad9b
+Subproject commit 9b0b4e1979633c4320dc0dea0707910c36cb056d