Cmake: add full path to xunit ouput
Cmake: add full path to xunit ouput

the new cmake version behave differently than the previous one, so add
the full path to the output

fueghan/navitia,ballouche/navitia,xlqian/navitia,xlqian/navitia,CanalTP/navitia,fueghan/navitia,is06/navitia,Tisseo/navitia,VincentCATILLON/navitia,datanel/navitia,stifoon/navitia,frodrigo/navitia,CanalTP/navitia,ballouche/navitia,pbougue/navitia,kadhikari/navitia,VincentCATILLON/navitia,TeXitoi/navitia,is06/navitia,datanel/navitia,TeXitoi/navitia,patochectp/navitia,patochectp/navitia,lrocheWB/navitia,francois-vincent/navitia,thiphariel/navitia,thiphariel/navitia,TeXitoi/navitia,djludo/navitia,kinnou02/navitia,xlqian/navitia,lrocheWB/navitia,kadhikari/navitia,ballouche/navitia,xlqian/navitia,prhod/navitia,Tisseo/navitia,kinnou02/navitia,fueghan/navitia,is06/navitia,francois-vincent/navitia,francois-vincent/navitia,VincentCATILLON/navitia,antoine-de/navitia,prhod/navitia,datanel/navitia,kadhikari/navitia,TeXitoi/navitia,kinnou02/navitia,Tisseo/navitia,patochectp/navitia,antoine-de/navitia,lrocheWB/navitia,djludo/navitia,is06/navitia,prhod/navitia,Tisseo/navitia,CanalTP/navitia,CanalTP/navitia,datanel/navitia,stifoon/navitia,antoine-de/navitia,antoine-de/navitia,ballouche/navitia,lrocheWB/navitia,frodrigo/navitia,francois-vincent/navitia,prhod/navitia,frodrigo/navitia,VincentCATILLON/navitia,stifoon/navitia,pbougue/navitia,stifoon/navitia,thiphariel/navitia,patochectp/navitia,djludo/navitia,CanalTP/navitia,djludo/navitia,pbougue/navitia,pbougue/navitia,fueghan/navitia,frodrigo/navitia,thiphariel/navitia,kadhikari/navitia,Tisseo/navitia,kinnou02/navitia,xlqian/navitia