Use a different reflect code number for compiled invocations.

Use a different reflect code number for compiled invocations.

Teach the continuation parser about it.

Turns out this doesn't actually coincide with the format the v8
microcode used for APPLY-COMPILED, which also has a frame size,
presumably so arity dispatch could be done in the callee.

(Not that the v8 stuff matters these days; maybe we should just flush
those parts of conpar.scm.)