fix KeyboardInterrupt handling when running cythonize() in parallel
fix KeyboardInterrupt handling when running cythonize() in parallel

mrGeen/cython,acrispin/cython,hickford/cython,dahebolangkuan/cython,slonik-az/cython,mcanthony/cython,da-woods/cython,andreasvc/cython,hickford/cython,achernet/cython,madjar/cython,fperez/cython,encukou/cython,hhsprings/cython,c-blake/cython,fabianrost84/cython,c-blake/cython,JelleZijlstra/cython,mcanthony/cython,roxyboy/cython,mrGeen/cython,mcanthony/cython,acrispin/cython,achernet/cython,ABcDexter/cython,JelleZijlstra/cython,da-woods/cython,mcanthony/cython,marscher/cython,JelleZijlstra/cython,marscher/cython,scoder/cython,fperez/cython,slonik-az/cython,cython/cython,JelleZijlstra/cython,andreasvc/cython,hhsprings/cython,cython/cython,da-woods/cython,marscher/cython,madjar/cython,andreasvc/cython,dahebolangkuan/cython,hhsprings/cython,encukou/cython,dahebolangkuan/cython,encukou/cython,fabianrost84/cython,ChristopherHogan/cython,achernet/cython,fabianrost84/cython,fperez/cython,acrispin/cython,mcanthony/cython,ABcDexter/cython,cython/cython,encukou/cython,ABcDexter/cython,slonik-az/cython,madjar/cython,andreasvc/cython,acrispin/cython,c-blake/cython,hickford/cython,fabianrost84/cython,ChristopherHogan/cython,ABcDexter/cython,hickford/cython,marscher/cython,cython/cython,roxyboy/cython,scoder/cython,roxyboy/cython,ChristopherHogan/cython,madjar/cython,mrGeen/cython,achernet/cython,slonik-az/cython,hhsprings/cython,roxyboy/cython,dahebolangkuan/cython,fperez/cython,mrGeen/cython,dahebolangkuan/cython,marscher/cython,achernet/cython,slonik-az/cython,JelleZijlstra/cython,roxyboy/cython,fabianrost84/cython,fperez/cython,encukou/cython,acrispin/cython,hhsprings/cython,andreasvc/cython,c-blake/cython,da-woods/cython,mrGeen/cython,scoder/cython,scoder/cython,ABcDexter/cython,hickford/cython,madjar/cython,c-blake/cython