circle.yml: ocaml-ci-skeleton scripts will brew install ocaml
circle.yml: ocaml-ci-skeleton scripts will brew install ocaml

and they get confused if someone else has already done it.

Signed-off-by: David Scott <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@recoil.org>

docker/datakit,docker/datakit,docker/datakit