[bug#45133] Add ocaml reactiveData

[divoplade]

Le jeudi 10 décembre 2020 à 13:41 +0100, zimoun a écrit :
> Therefore, instead of patching the Makefile, why not simple try to
> remove it see what happens? :-)

I tried to explain that in my previous email, if it's not clear please
excuse my english skills ^^ the build fails because pkg/build.ml needs
to be called with arguments (native=true or false) that ocaml-build-
system ignores.