Update git submodules

* Update docs/submodules/armband from branch 'master'
  - Remove build instruction from documentation

    Fuel/MCP no longer packages the installer in an iso, therefore
    these building instructions are obsolete.

    JIRA:ARMBAND-293

    Change-Id: I18e5a7beb41656f0c6b61dccbe5609530e2b70b6
    Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index d0d38b2..d7f4249 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit d0d38b28fa302f8c9dbd18a16e4102787c528547
+Subproject commit d7f424917b2e2ced95ba98cc5238bcf94278bb93