6a5646afe5
-DNO_CLEAN builds have had trouble across the OpenZFS import. It's not worth the effort to try to address this with any granularity; instead, just trigger on a .depend file indicating a tree from before the import, and remove the whole cddl object tree. Reviewed by: mmacy, kevans Differential Revision: https://reviews.freebsd.org/D26189
$FreeBSD$ This directory tree contains tools used for the maintenance and testing of FreeBSD. There is no toplevel Makefile structure since these tools are not meant to be built as part of the standard system, though there may be individual Makefiles in some of the subdirs. Please read the README files in the subdirs for further information.