quantor-3.2: enable x86_64 support for ar and ranlib
quantor-3.2: enable x86_64 support for ar and ranlib

See:
https://github.com/fdopen/opam-repository-mingw/commit/54f860c105

c-cube/ocaml-qbf,c-cube/ocaml-qbf,c-cube/ocaml-qbf