fix opkg directory cleaning (#5646)

SVN-Revision: 17952

package/Makefile

@@ -75,7 +75,7 @@ $(curdir)/rootfs-prepare: $(TMP_DIR)/.build
 	@-find $(TARGET_DIR) -name CVS   | $(XARGS) rm -rf
 	@-find $(TARGET_DIR) -name .svn  | $(XARGS) rm -rf
 	@-find $(TARGET_DIR) -name '.#*' | $(XARGS) rm -f
-	$(if $(CONFIG_CLEAN_IPKG),rm -rf $(TARGET_DIR)/usr/lib/ipkg)
+	$(if $(CONFIG_CLEAN_IPKG),rm -rf $(TARGET_DIR)/usr/lib/opkg)
 	$(call mklibs)
 
 $(curdir)/index: FORCE