Change the order of the enum values to change order for 0 and 1
Change the order of the enum values to change order for 0 and 1

Change the order so that the topk function values change when passing in the
default value of 0 to 1. Previously the behavior was the same for 0 and 1
which could cause confusion.

9prady9/arrayfire,umar456/arrayfire,umar456/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,umar456/arrayfire,umar456/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,9prady9/arrayfire