makefile cleanup for bind

package/bind/bind.mk

@@ -25,7 +25,7 @@ bind-source: $(DL_DIR)/$(BIND_SOURCE)
 $(BIND_DIR2)/.unpacked: $(DL_DIR)/$(BIND_SOURCE)
 	$(BIND_CAT) $(DL_DIR)/$(BIND_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
 	toolchain/patch-kernel.sh $(BIND_DIR2) package/bind/ bind\*.patch
-	touch $(BIND_DIR2)/.unpacked
+	touch $@
 
 $(BIND_DIR2)/Makefile: $(BIND_DIR2)/.unpacked
 	(cd $(BIND_DIR2); rm -rf config.cache; \
@@ -51,7 +51,7 @@ $(BIND_DIR2)/Makefile: $(BIND_DIR2)/.unpacked
 
 $(BIND_DIR2)/$(BIND_BINARY): $(BIND_DIR2)/Makefile
 	$(MAKE) $(TARGET_CONFIGURE_OPTS) -j1 -C $(BIND_DIR2)
-	touch -c $(BIND_DIR2)/$(BIND_BINARY)
+	touch -c $@
 
 #############################################################
 #