Adding dl libs explicitly to the OpenCL backend
Adding dl libs explicitly to the OpenCL backend

- clFFT depends on the dl libs
- Fails on a few compilers if not explicitly specified

shehzan10/arrayfire,ghisvail/arrayfire,marbre/arrayfire,0x0all/arrayfire,kylelutz/arrayfire,9prady9/arrayfire,Keno/arrayfire,victorv/arrayfire,mrgloom/arrayfire,linan7788626/arrayfire,asifmadnan/arrayfire,umar456/arrayfire,HolyGeneralK/arrayfire,marbre/arrayfire,bkloppenborg/arrayfire,merlin-ext/arrayfire,umar456/arrayfire,linan7788626/arrayfire,marbre/arrayfire,unbornchikken/arrayfire,marbre/arrayfire,mrgloom/arrayfire,pentschev/arrayfire,9prady9/arrayfire,kylelutz/arrayfire,pentschev/arrayfire,jramapuram/arrayfire,asifmadnan/arrayfire,pentschev/arrayfire,bkloppenborg/arrayfire,victorv/arrayfire,hshindo/arrayfire,linan7788626/arrayfire,arrayfire/arrayfire,HolyGeneralK/arrayfire,jramapuram/arrayfire,arrayfire/arrayfire,Keno/arrayfire,merlin-ext/arrayfire,arrayfire/arrayfire,ghisvail/arrayfire,unbornchikken/arrayfire,jramapuram/arrayfire,9prady9/arrayfire,jramapuram/arrayfire,ghisvail/arrayfire,pombredanne/arrayfire,arrayfire/arrayfire,HolyGeneralK/arrayfire,pavanky/arrayfire,pombredanne/arrayfire,shehzan10/arrayfire,shehzan10/arrayfire,munnybearz/arrayfire,ghisvail/arrayfire,asifmadnan/arrayfire,asifmadnan/arrayfire,pavanky/arrayfire,hshindo/arrayfire,victorv/arrayfire,unbornchikken/arrayfire,Keno/arrayfire,pombredanne/arrayfire,0x0all/arrayfire,pentschev/arrayfire,bkloppenborg/arrayfire,umar456/arrayfire,merlin-ext/arrayfire,9prady9/arrayfire,pombredanne/arrayfire,bkloppenborg/arrayfire,hshindo/arrayfire,glehmann/arrayfire,victorv/arrayfire,umar456/arrayfire,hshindo/arrayfire,mrgloom/arrayfire,pavanky/arrayfire,HolyGeneralK/arrayfire,merlin-ext/arrayfire,shehzan10/arrayfire,munnybearz/arrayfire,mrgloom/arrayfire,Keno/arrayfire,pavanky/arrayfire,glehmann/arrayfire,linan7788626/arrayfire,munnybearz/arrayfire,unbornchikken/arrayfire