This directory is created mainly for easy distribution of ReScript

We need copy config.ml(i) lexer.ml(i) parser.ml(i) runtimedef.ml(i) from ocaml 4.02.3 distribution

config.ml(i) are changed to dummy, since those configurations only make sense in C/ASM/Bytecode backend.

The runtime should be rewritten to avoid using (String/Bytes) (since we modified it) any standard library.

Since ReScript has different cmi_format from 4.02.3 due to external attributes, so cmis generated by OCaml 4.02.3 is not ABI compatible with cmis generated by ReScript