Update git submodules

* Update docs/submodules/armband from branch 'master'
  - Merge "Revert "[p/openstack.nova] Allow creation of pty on aarch64""
  - Revert "[p/openstack.nova] Allow creation of pty on aarch64"

    This reverts commit 075143e95d5b42d615ab7c81446095746e1f0064.

    Change-Id: I720d47dd5c69077363501e642730df9db1dcef81

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 5707786..b327d82 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 57077863535cb1f50b56fed24cea07bd129874ff
+Subproject commit b327d829cdb20a81c63f4039ee7c9950be66ed80