Create apt/preferences.d in APTTMP, keeps newer apt from printing a warning.

Makefile

@@ -190,7 +190,7 @@ status: init $(ADIR)/status
 $(ADIR)/status:
 	@echo "Generating a fake status file for apt-get and apt-cache..."
 	$(Q)for ARCH in $(ARCHES); do \
-		mkdir -p $(ADIR)/$(CODENAME)-$$ARCH; \
+		mkdir -p $(ADIR)/$(CODENAME)-$$ARCH/apt/preferences.d; \
 		if [ $$ARCH = "source" -o "$(INSTALLER_CD)" = "1" -o "$(INSTALLER_CD)" = "2" ];then \
 			:> $(ADIR)/$(CODENAME)-$$ARCH/status ; \
 		else \

debian/changelog

@@ -24,6 +24,7 @@ debian-cd (3.1.3) UNRELEASED; urgency=low
     packages or D-I components relative to a regular image.
   * Add variant to create i386/amd64 images that support installing Xen guests.
   * Recognise and ignore Enhances: lines.
+  * Create apt/preferences.d in APTTMP, keeps newer apt from printing a warning.
 
   [ Raphaël Hertzog ]
   * Fallback looking for syslinux/silo/yaboot in $CODENAME when $DI_CODENAME