Fixed tar on Mac OS X.

Author: arnested

Makefile

@@ -46,7 +46,7 @@ $(ARCHIVE_NAME)-pkg.el: $(ARCHIVE_NAME).el
 
 # create a tar ball in package.el format for uploading to http://marmalade-repo.org
 $(PACKAGE_NAME).tar: README $(ARCHIVE_NAME).el $(ARCHIVE_NAME)-pkg.el $(ARCHIVE_NAME).info dir drupal/*.el drupal-tests.el drush-make-mode.el
-	$(TAR) -c -s "@^@$(PACKAGE_NAME)/@" -f $(PACKAGE_NAME).tar $^
+	COPYFILE_DISABLE=1 $(TAR) -c -s "@^@$(PACKAGE_NAME)/@" -f $(PACKAGE_NAME).tar $^
 
 install: $(PACKAGE_NAME).tar
 	$(EMACS) --batch -l package -f package-initialize --eval "(package-install-file \"$(PWD)/$(PACKAGE_NAME).tar\")"