Adding documentation for `device` that it locks the memory.
Adding documentation for `device` that it locks the memory.

pentschev/arrayfire,umar456/arrayfire,ghisvail/arrayfire,umar456/arrayfire,marbre/arrayfire,munnybearz/arrayfire,9prady9/arrayfire,victorv/arrayfire,munnybearz/arrayfire,umar456/arrayfire,munnybearz/arrayfire,hshindo/arrayfire,merlin-ext/arrayfire,merlin-ext/arrayfire,bkloppenborg/arrayfire,hshindo/arrayfire,bkloppenborg/arrayfire,pentschev/arrayfire,victorv/arrayfire,arrayfire/arrayfire,shehzan10/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,hshindo/arrayfire,marbre/arrayfire,pentschev/arrayfire,umar456/arrayfire,shehzan10/arrayfire,hshindo/arrayfire,merlin-ext/arrayfire,arrayfire/arrayfire,marbre/arrayfire,marbre/arrayfire,bkloppenborg/arrayfire,ghisvail/arrayfire,victorv/arrayfire,shehzan10/arrayfire,9prady9/arrayfire,bkloppenborg/arrayfire,arrayfire/arrayfire,9prady9/arrayfire,ghisvail/arrayfire,merlin-ext/arrayfire,victorv/arrayfire,pentschev/arrayfire,ghisvail/arrayfire,shehzan10/arrayfire