[CM] getting clm-4 to run on mac osx 10.6.4

[Bill Schottstaedt]

> maybe bill has the benchmarks

way too many in fact.  Here's the set in s7.html which is
representative (100 seconds of sound in both cases):

          s7 interpreted  s7+run  C (-O2)      sbcl
bird          9.6          .7       .65         .65
violin       21.6         1.44     1.28        1.28

There's more in  https://ccrma.stanford.edu/software/snd/snd/s7.html#s7rundoc
and many more timings in run.c.  Since you don't have to screw around with
the C compiler and foreign libraries, and can write arbitrary sndlib code
in with-sound directly (without run or instruments), I think the Scheme
version is faster overall.