Have the coq_makefile timing test-suite print more
Have the coq_makefile timing test-suite print more

This should help debug things like
https://github.com/coq/coq/issues/5675#issuecomment-345324924 if they
ever show up again.

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