update submodule to 1.2.2-1

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/ifupdown2 b/ifupdown2
index fb4bd746d65fc4895b17c4812f7416aec18ae594..e28cc684133a8a344e5c3455c504a44b4133cab0 160000 (submodule)
--- a/ifupdown2
+++ b/ifupdown2
@@ -1 +1 @@
-Subproject commit fb4bd746d65fc4895b17c4812f7416aec18ae594
+Subproject commit e28cc684133a8a344e5c3455c504a44b4133cab0