fix so file path building in Py2.[45]
fix so file path building in Py2.[45]

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