coq_makefile: fix .merlin generation (FLG -thread)
coq_makefile: fix .merlin generation (FLG -thread)

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