Define CUmodule type

Author: againull

sycl/include/CL/sycl/backend/cuda.hpp

@@ -21,6 +21,7 @@ typedef int CUdevice;
 typedef struct CUctx_st *CUcontext;
 typedef struct CUstream_st *CUstream;
 typedef struct CUevent_st *CUevent;
+typedef struct CUmod_st *CUmodule;
 
 // As defined in the CUDA 10.1 header file. This requires CUDA version > 3.2
 #if defined(_WIN64) || defined(__LP64__)