add "make promote" target
add "make promote" target

dra27/merlin,ocaml/merlin,ocaml/merlin,the-lambda-church/merlin,the-lambda-church/merlin,dra27/merlin,ocaml/merlin,rgrinberg/merlin,dra27/merlin,the-lambda-church/merlin,rgrinberg/merlin,rgrinberg/merlin,dra27/merlin,rgrinberg/merlin,ocaml/merlin