cross compile shell script (was Re: gencgc for ppc)

I tried sending these files to the list, but as far as I can
tell they have 
yet to arrive.  Hopefully it will be received this time
around! 


-- Binary/unsupported file stripped by Listar --
-- Type: application/octet-stream
-- File: freebsd-setenv-1.lisp


-- Binary/unsupported file stripped by Listar --
-- Type: application/octet-stream
-- File: crosscompile.sh


-- Binary/unsupported file stripped by Listar --
-- Type: application/octet-stream
-- File: freebsd-setenv-3.lisp