cryptsetup-suspend-wrapper: Explicitly disable udev support when resuming.

This is not ideal since udev might be required in some situations
(detached header or key material on removable device comes to mind), but
udev was stopped in ≤2:2.5.0-2 so this is not a regression.

Regression from 89b29a3c.

Closes: #1020553

debian/scripts/suspend/cryptsetup-suspend-wrapper

@@ -298,7 +298,7 @@ devices_remaining="$(chroot "$INITRAMFS_DIR" /bin/sh -c "
     # resume active luks devices (only initramfs devices)
     for dev in $ACTIVE_DEVICES; do
         if crypttab_find_entry --quiet \"\$dev\"; then
-            resume_device \"\$dev\" || sleep 5
+            DM_DISABLE_UDEV=y resume_device \"\$dev\" || sleep 5
         else
             # write remaining devices to FD3
             printf \"%s \" \"\$dev\" >&3
@@ -309,7 +309,10 @@ devices_remaining="$(chroot "$INITRAMFS_DIR" /bin/sh -c "
 # resume remaining active luks devices (non-initramfs devices)
 for dev in $devices_remaining; do
     if crypttab_find_entry --quiet "$dev"; then
-        resume_device "$dev" || true
+        # explicitely disable udev support, cf. #1020553
+        # XXX this is not ideal since udev might be required in some situations
+        # (detached header or key material on removable device comes to mind)
+        DM_DISABLE_UDEV=y resume_device "$dev" || true
     else
         log_error "'$dev' not found in /etc/crypttab"
     fi