fstest: Skip RangeOption test on Appveyor also
fstest: Skip RangeOption test on Appveyor also

yonjah/rclone,B4dM4n/rclone,B4dM4n/rclone,seuffert/rclone,ncw/rclone,ncw/rclone,olihey/rclone,ncw/rclone,olihey/rclone,seuffert/rclone,seuffert/rclone,ncw/rclone,yonjah/rclone,B4dM4n/rclone,yonjah/rclone,B4dM4n/rclone,olihey/rclone,seuffert/rclone,yonjah/rclone,olihey/rclone