Added basic cn/gpu support.

src/backend/opencl/kernels/Cn1Kernel.h

@@ -37,6 +37,7 @@ class Cn1Kernel : public OclKernel
 public:
     Cn1Kernel(cl_program program);
     Cn1Kernel(cl_program program, uint64_t height);
+
     bool enqueue(cl_command_queue queue, uint32_t nonce, size_t threads, size_t worksize);
     bool setArgs(cl_mem input, cl_mem scratchpads, cl_mem states, uint32_t threads);
 };