Update git submodules

* Update docs/submodules/armband from branch 'master'
  - [patch] Bump & rebase for pymysql update

    Change-Id: I1cfe66962bf582a278412a648307f78fa9bc66c5
    Signed-off-by: Delia Popescu <delia.popescu@enea.com>

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 76fc13c..85efa24 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 76fc13c29603e5d43e84d8cf6f504c6460afce08
+Subproject commit 85efa248f9aab958369c44e6da4c9b0cbba4da3b