macosx: add %darwin alias for puredarwin use
macosx: add %darwin alias for puredarwin use

devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5,devzero2000/RPM5