Add support for polymorphic constants.
Add support for polymorphic constants.

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