12007 make_test always returns non-zero
Reviewed by: Robert Mustacchi <rm@fingolfin.org>
Reviewed by: John Levon <john.levon@joyent.com>
Approved by: Dan McDonald <danmcd@joyent.com>

11949 make -C caches wrong directory contents
Reviewed by: Robert Mustacchi <rm@fingolfin.org>
Approved by: Dan McDonald <danmcd@joyent.com>