Adding AF_CPU definition to CPU backend
Adding AF_CPU definition to CPU backend

jramapuram/arrayfire,jramapuram/arrayfire,bkloppenborg/arrayfire,marbre/arrayfire,mrgloom/arrayfire,pombredanne/arrayfire,linan7788626/arrayfire,mrgloom/arrayfire,jramapuram/arrayfire,shehzan10/arrayfire,victorv/arrayfire,pentschev/arrayfire,9prady9/arrayfire,pentschev/arrayfire,ghisvail/arrayfire,umar456/arrayfire,munnybearz/arrayfire,mrgloom/arrayfire,asifmadnan/arrayfire,hshindo/arrayfire,pombredanne/arrayfire,unbornchikken/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,merlin-ext/arrayfire,hshindo/arrayfire,unbornchikken/arrayfire,HolyGeneralK/arrayfire,HolyGeneralK/arrayfire,bkloppenborg/arrayfire,merlin-ext/arrayfire,hshindo/arrayfire,victorv/arrayfire,victorv/arrayfire,umar456/arrayfire,linan7788626/arrayfire,asifmadnan/arrayfire,bkloppenborg/arrayfire,asifmadnan/arrayfire,9prady9/arrayfire,asifmadnan/arrayfire,arrayfire/arrayfire,HolyGeneralK/arrayfire,marbre/arrayfire,victorv/arrayfire,marbre/arrayfire,Keno/arrayfire,mrgloom/arrayfire,umar456/arrayfire,ghisvail/arrayfire,9prady9/arrayfire,unbornchikken/arrayfire,linan7788626/arrayfire,marbre/arrayfire,Keno/arrayfire,munnybearz/arrayfire,ghisvail/arrayfire,ghisvail/arrayfire,munnybearz/arrayfire,jramapuram/arrayfire,shehzan10/arrayfire,shehzan10/arrayfire,pentschev/arrayfire,merlin-ext/arrayfire,pombredanne/arrayfire,shehzan10/arrayfire,bkloppenborg/arrayfire,arrayfire/arrayfire,pombredanne/arrayfire,9prady9/arrayfire,Keno/arrayfire,hshindo/arrayfire,pentschev/arrayfire,merlin-ext/arrayfire,unbornchikken/arrayfire,linan7788626/arrayfire,HolyGeneralK/arrayfire,Keno/arrayfire,umar456/arrayfire