test-suite: Fix test-suite Makefile
test-suite: Fix test-suite Makefile

Using relative path for coqlib, for some reason this fails on Mac OS
X. Took the easiest way to fix it.

ejgallego/coq,letouzey/coq-wip,herbelin/github-coq,JasonGross/coq,coq/coq,coq/coq,maximedenes/coq,JasonGross/coq,barras/coq,8l/coq,Ptival/coq,Ptival/coq,gares/coq,coq/coq,Zimmi48/coq,barras/coq,8l/coq,william-lawvere/coq,SkySkimmer/coq,gares/coq,letouzey/coq-wip,maximedenes/coq,maximedenes/coq,jpdeplaix/coq,silene/coq,gares/coq,ejgallego/coq,mattam82/coq,TOSPIO/coq,Matafou/coq,herbelin/github-coq,TheTypoMaster/coq,SkySkimmer/coq,amintimany/coq,letouzey/coq-wip,TheTypoMaster/coq,mlasson/coq,william-lawvere/coq,Matafou/coq,amintimany/coq,silene/coq,Lionel-Rieg/coq,JasonGross/coq,SkySkimmer/coq,mlasson/coq,TheTypoMaster/coq,Zimmi48/coq,silene/coq,Lionel-Rieg/coq,amintimany/coq,ppedrot/coq,TOSPIO/coq,SkySkimmer/coq,ppedrot/coq,gares/coq,Zimmi48/coq,mattam82/coq,ejgallego/coq,mlasson/coq,herbelin/github-coq,Zimmi48/coq,TOSPIO/coq,Ptival/coq,maximedenes/coq,maximedenes/coq,gares/coq,ppedrot/coq,letouzey/coq-wip,coq/coq,barras/coq,JasonGross/coq,ppedrot/coq,ppedrot/coq,ejgallego/coq,8l/coq,jpdeplaix/coq,jpdeplaix/coq,letouzey/coq-wip,Lionel-Rieg/coq,mattam82/coq,Matafou/coq,william-lawvere/coq