[test-suite] Use the right OCAMLPATH separator on Windows.
[test-suite] Use the right OCAMLPATH separator on Windows.

Hopefully this goes away when OCAMLPATH is properly handled by the
build system.

gares/coq,Zimmi48/coq,Zimmi48/coq,maximedenes/coq,silene/coq,coq/coq,JasonGross/coq,JasonGross/coq,SkySkimmer/coq,ppedrot/coq,ppedrot/coq,JasonGross/coq,ppedrot/coq,SkySkimmer/coq,ppedrot/coq,Matafou/coq,Zimmi48/coq,ppedrot/coq,gares/coq,silene/coq,gares/coq,SkySkimmer/coq,silene/coq,SkySkimmer/coq,maximedenes/coq,ejgallego/coq,maximedenes/coq,Zimmi48/coq,gares/coq,ejgallego/coq,maximedenes/coq,coq/coq,coq/coq,Matafou/coq,JasonGross/coq,gares/coq,ejgallego/coq,coq/coq,maximedenes/coq,ejgallego/coq,Matafou/coq