Update the .mailmap file.
Update the .mailmap file.

The update process is as follows: run "git shortlog -s -e" and look for
duplicate or missing contributors.

william-lawvere/coq,barras/coq,letouzey/coq-wip,ejgallego/coq,coq/coq,gares/coq,herbelin/github-coq,coq/coq,ejgallego/coq,Lionel-Rieg/coq,letouzey/coq-wip,ppedrot/coq,letouzey/coq-wip,SkySkimmer/coq,silene/coq,ppedrot/coq,SkySkimmer/coq,Matafou/coq,Lionel-Rieg/coq,maximedenes/coq,Ptival/coq,gares/coq,william-lawvere/coq,william-lawvere/coq,Ptival/coq,gares/coq,silene/coq,amintimany/coq,JasonGross/coq,mattam82/coq,JasonGross/coq,gares/coq,jpdeplaix/coq,maximedenes/coq,JasonGross/coq,letouzey/coq-wip,ejgallego/coq,Matafou/coq,letouzey/coq-wip,maximedenes/coq,Zimmi48/coq,coq/coq,ppedrot/coq,ejgallego/coq,ppedrot/coq,Ptival/coq,mattam82/coq,barras/coq,maximedenes/coq,amintimany/coq,amintimany/coq,JasonGross/coq,jpdeplaix/coq,Zimmi48/coq,gares/coq,ppedrot/coq,herbelin/github-coq,barras/coq,SkySkimmer/coq,silene/coq,herbelin/github-coq,SkySkimmer/coq,maximedenes/coq,Lionel-Rieg/coq,jpdeplaix/coq,Matafou/coq,Zimmi48/coq,mattam82/coq,coq/coq,Zimmi48/coq