updated openmcl patch



> ...I guess all platforms that we're interested in support
define-compiler-macro

Speaking of which, do we have any sort of coding guidelines saying what
we can and can't expect from the underlying Lisp?  If you develop in GCL
(avoiding implementation-specific features) can you expect the other
Lisps to be supersets?  Are there any specific CL features to be avoided
because they're known to be flaky or grossly inefficient or whatever on
some implementations?

     -s