Update git submodules

* Update docs/submodules/armband from branch 'master'
  - p/fuel: armband formula: Fixup security_driver

    Previous changes set security_driver to none (without quotes),
    which conflicts with libvirt 3.x.
    Fix it by adding required quotes.

    Change-Id: I699da4c9cb5d77fe6e959e476d3279f3d679edc6
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index e0197ea..e598628 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit e0197eafd11b2c05f8bda4f569212a77b7e4b992
+Subproject commit e598628cf9603a3484d574ab5cb0c99311e2ddff