[VM] Rename reloc -> cenv
[VM] Rename reloc -> cenv

The renaming is internal only. I believe the name reloc is legacy and
a bit confusing now that the structure contains a full compilation
environment.

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