More build failure

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

On port-amd64, with an empty $DESTDIR, a './build.sh release' results in 
the following:

--- cleandir-gnu/lib ---
nbmake: nbmake: don't know how to make clean. Stop
*** [cleandir-include] Error code 2

This is with sources updated via anoncvs as of 2008-10-29 12:49:08 UTC

The same command completes successfully for port-i386, so I'm suspecting 
something to do with turning on the 32-bit library stuff for amd64?

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