ar71xx: create separate 'factory' and 'sysupgrade' images for the WRT160NL

The 'factory' image requires the garbage at the end of the image.
Flashing from the original web interface does not work without that.

SVN-Revision: 21168

target/linux/ar71xx/image/Makefile

@@ -320,7 +320,10 @@ define Image/Build/CyberTAN
 		-x 32 -a 0x10000 -x -32 -f $(KDIR)/root.$(1)
 	-$(STAGING_DIR_HOST)/bin/addpattern -B $(2) -v v$(4) \
 		-i $(KDIR)/image.tmp \
-		-o $(call imgname,$(1),$(2)).bin
+		-o $(call imgname,$(1),$(2))-sysupgrade.bin
+	-$(STAGING_DIR_HOST)/bin/addpattern -B $(2) -v v$(4) -g \
+		-i $(KDIR)/image.tmp \
+		-o $(call imgname,$(1),$(2))-factory.bin
 	rm $(KDIR)/image.tmp
 endef