Bench: add .log extension to .stdout/stderr files
Bench: add .log extension to .stdout/stderr files

Hopefully this allows viewing online with a download dialog on gitlab.

Zimmi48/coq,Zimmi48/coq,coq/coq,Zimmi48/coq,silene/coq,SkySkimmer/coq,JasonGross/coq,JasonGross/coq,coq/coq,silene/coq,JasonGross/coq,ejgallego/coq,Zimmi48/coq,SkySkimmer/coq,silene/coq,ejgallego/coq,SkySkimmer/coq,coq/coq,SkySkimmer/coq,ejgallego/coq,ejgallego/coq,JasonGross/coq,coq/coq