Added mechanism for selecting device types (HL_OCL_DEVICE)
Added mechanism for selecting device types (HL_OCL_DEVICE)


Former-commit-id: db35dfc74369d800cd37411cb3546df2b82293a2
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide