Fix ifdef order to allow building jsdate on cygwin.
Fix ifdef order to allow building jsdate on cygwin.

earthling42/mujs,guiquanz/mujs,evanlabs/mujs,ccxvii/mujs,thurday/mujs,ccxvii/mujs,BOGY/mujs,ccxvii/mujs,lsm/mujs,ccxvii/mujs,Frky/mujs