MAINT: runtests.py: ensure Ctrl-C interrupts the build
MAINT: runtests.py: ensure Ctrl-C interrupts the build

Previously, pressing Ctrl-C when running runtests.py would leave 'python
build' running in the background.

matthewalbani/scipy,endolith/scipy,rgommers/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,bkendzior/scipy,apbard/scipy,pbrod/scipy,aeklant/scipy,surhudm/scipy,nmayorov/scipy,rgommers/scipy,befelix/scipy,jakevdp/scipy,nmayorov/scipy,gertingold/scipy,Eric89GXL/scipy,zerothi/scipy,gdooper/scipy,pizzathief/scipy,anielsen001/scipy,mdhaber/scipy,anielsen001/scipy,gfyoung/scipy,person142/scipy,perimosocordiae/scipy,surhudm/scipy,Newman101/scipy,vigna/scipy,ilayn/scipy,Gillu13/scipy,befelix/scipy,matthew-brett/scipy,haudren/scipy,nonhermitian/scipy,anntzer/scipy,mdhaber/scipy,mdhaber/scipy,mikebenfield/scipy,chatcannon/scipy,scipy/scipy,josephcslater/scipy,jakevdp/scipy,chatcannon/scipy,pizzathief/scipy,pbrod/scipy,scipy/scipy,argriffing/scipy,jor-/scipy,gfyoung/scipy,Eric89GXL/scipy,Gillu13/scipy,niknow/scipy,anielsen001/scipy,WarrenWeckesser/scipy,befelix/scipy,arokem/scipy,surhudm/scipy,person142/scipy,WarrenWeckesser/scipy,ilayn/scipy,kleskjr/scipy,jakevdp/scipy,WarrenWeckesser/scipy,jakevdp/scipy,andyfaff/scipy,behzadnouri/scipy,behzadnouri/scipy,endolith/scipy,mikebenfield/scipy,gertingold/scipy,sriki18/scipy,perimosocordiae/scipy,matthewalbani/scipy,lhilt/scipy,pizzathief/scipy,argriffing/scipy,surhudm/scipy,matthewalbani/scipy,niknow/scipy,andyfaff/scipy,gdooper/scipy,nonhermitian/scipy,pizzathief/scipy,pyramania/scipy,jor-/scipy,behzadnouri/scipy,anntzer/scipy,bkendzior/scipy,aarchiba/scipy,matthew-brett/scipy,dominicelse/scipy,befelix/scipy,pschella/scipy,gfyoung/scipy,andyfaff/scipy,grlee77/scipy,Newman101/scipy,e-q/scipy,pbrod/scipy,larsmans/scipy,chatcannon/scipy,sriki18/scipy,kleskjr/scipy,e-q/scipy,josephcslater/scipy,vigna/scipy,mdhaber/scipy,gfyoung/scipy,tylerjereddy/scipy,behzadnouri/scipy,niknow/scipy,matthewalbani/scipy,argriffing/scipy,pyramania/scipy,nonhermitian/scipy,WarrenWeckesser/scipy,aarchiba/scipy,pschella/scipy,sriki18/scipy,josephcslater/scipy,gdooper/scipy,rgommers/scipy,matthewalbani/scipy,haudren/scipy,kleskjr/scipy,zerothi/scipy,jamestwebber/scipy,sriki18/scipy,jjhelmus/scipy,bkendzior/scipy,dominicelse/scipy,maniteja123/scipy,scipy/scipy,jakevdp/scipy,anntzer/scipy,kalvdans/scipy,larsmans/scipy,pizzathief/scipy,Stefan-Endres/scipy,josephcslater/scipy,Gillu13/scipy,nmayorov/scipy,chatcannon/scipy,nmayorov/scipy,Newman101/scipy,gertingold/scipy,zerothi/scipy,mdhaber/scipy,arokem/scipy,perimosocordiae/scipy,kalvdans/scipy,aarchiba/scipy,ilayn/scipy,aeklant/scipy,perimosocordiae/scipy,befelix/scipy,grlee77/scipy,apbard/scipy,larsmans/scipy,larsmans/scipy,chatcannon/scipy,Stefan-Endres/scipy,scipy/scipy,jjhelmus/scipy,Eric89GXL/scipy,rgommers/scipy,chatcannon/scipy,mdhaber/scipy,josephcslater/scipy,mikebenfield/scipy,Gillu13/scipy,kleskjr/scipy,larsmans/scipy,maniteja123/scipy,rgommers/scipy,woodscn/scipy,lhilt/scipy,jjhelmus/scipy,anielsen001/scipy,tylerjereddy/scipy,gdooper/scipy,tylerjereddy/scipy,lhilt/scipy,Eric89GXL/scipy,woodscn/scipy,pyramania/scipy,Stefan-Endres/scipy,haudren/scipy,anntzer/scipy,grlee77/scipy,arokem/scipy,dominicelse/scipy,vigna/scipy,endolith/scipy,kleskjr/scipy,andyfaff/scipy,scipy/scipy,Gillu13/scipy,apbard/scipy,arokem/scipy,aeklant/scipy,pschella/scipy,zerothi/scipy,larsmans/scipy,aeklant/scipy,maniteja123/scipy,vigna/scipy,apbard/scipy,kalvdans/scipy,perimosocordiae/scipy,Eric89GXL/scipy,nonhermitian/scipy,maniteja123/scipy,ilayn/scipy,perimosocordiae/scipy,bkendzior/scipy,argriffing/scipy,endolith/scipy,Newman101/scipy,andyfaff/scipy,jor-/scipy,kalvdans/scipy,nonhermitian/scipy,e-q/scipy,mikebenfield/scipy,e-q/scipy,andyfaff/scipy,Newman101/scipy,grlee77/scipy,ilayn/scipy,gertingold/scipy,matthew-brett/scipy,niknow/scipy,jor-/scipy,haudren/scipy,Gillu13/scipy,woodscn/scipy,matthew-brett/scipy,grlee77/scipy,maniteja123/scipy,endolith/scipy,aeklant/scipy,Stefan-Endres/scipy,mikebenfield/scipy,aarchiba/scipy,jor-/scipy,surhudm/scipy,behzadnouri/scipy,surhudm/scipy,endolith/scipy,niknow/scipy,maniteja123/scipy,woodscn/scipy,haudren/scipy,anntzer/scipy,argriffing/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,kalvdans/scipy,anntzer/scipy,jamestwebber/scipy,pyramania/scipy,pschella/scipy,behzadnouri/scipy,anielsen001/scipy,gertingold/scipy,lhilt/scipy,dominicelse/scipy,sriki18/scipy,lhilt/scipy,person142/scipy,arokem/scipy,zerothi/scipy,jamestwebber/scipy,aarchiba/scipy,vigna/scipy,pbrod/scipy,pbrod/scipy,person142/scipy,argriffing/scipy,jamestwebber/scipy,nmayorov/scipy,dominicelse/scipy,Eric89GXL/scipy,e-q/scipy,gfyoung/scipy,pschella/scipy,ilayn/scipy,pyramania/scipy,gdooper/scipy,Stefan-Endres/scipy,jamestwebber/scipy,haudren/scipy,jjhelmus/scipy,kleskjr/scipy,woodscn/scipy,sriki18/scipy,jjhelmus/scipy,woodscn/scipy,Newman101/scipy,scipy/scipy,tylerjereddy/scipy,person142/scipy,matthew-brett/scipy,niknow/scipy,bkendzior/scipy,apbard/scipy,anielsen001/scipy,pbrod/scipy,zerothi/scipy