[coq-makefile] do not export OCAMLPATH, rely on -I only
[coq-makefile] do not export OCAMLPATH, rely on -I only

SkySkimmer/coq,coq/coq,ejgallego/coq,ejgallego/coq,ejgallego/coq,Zimmi48/coq,Zimmi48/coq,SkySkimmer/coq,coq/coq,coq/coq,SkySkimmer/coq,coq/coq,Zimmi48/coq,Zimmi48/coq,ejgallego/coq,SkySkimmer/coq