Fix cython setup script
Fix cython setup script

(cherry picked from commit 81da8de)

fabioz/PyDev.Debugger,Elizaveta239/PyDev.Debugger,fabioz/PyDev.Debugger,fabioz/PyDev.Debugger,Elizaveta239/PyDev.Debugger,fabioz/PyDev.Debugger,Elizaveta239/PyDev.Debugger,fabioz/PyDev.Debugger,Elizaveta239/PyDev.Debugger,Elizaveta239/PyDev.Debugger