vm/mimeopen: add missing misc-post-stop.sh script (#423)

vm-systemd/misc-post-stop.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Save default applications for DispVM
+
+su -c 'mkdir -p /home_volatile/user/.local/share/applications' user
+su -c 'cp -a /home/user/.local/share/applications/defaults.list /home_volatile/user/.local/share/applications/' user
+
+exit 0