Initial opencl_host runtime module
Initial opencl_host runtime module


Former-commit-id: 4aa227f8b7db71281bd78d7e642dcf961d058d8c
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide