to enable this.
1: it was running xlint out of the object directory, which is not
safe (ie: run a 5.x binary on a 4.x world - no libc.so.5, or run an
alpha binary on x86).
2: lint has /usr/libexec/lint1 and /usr/libexec/lint2 hard coded in.
This is the same as problem 1.
3: lint has got /usr/bin/cc hard coded in as well. Also, see problem 1.
There are probably more problems, but these are enough of a showstopper.
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