amd64 build still broken

[Paul Goyette <paul%whooppee.com@localhost>]

With all of MKDEBUG{,KERNEL,LIB} enabled, and with both christos's and
kre's latest commits, I'm seeing

checkflist ===> distrib/sets
======  1 missing files in DESTDIR  ========
Files in flist but missing from DESTDIR.
File wasn't installed ?
------------------------------------------
./usr/libdata/debug/usr/tests/lib/libc/sys/t_close_range.debug
========  end of 1 missing files  ==========
--- checkflist ---
*** Failed target: checkflist


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