Tests: Ensure CUDA bin2c output is null terminated

The default behavior of bin2c is to create binary arrays that have no
null termination.  So to use it as a C array we need to explicitly tell
it to create valid null terminated strings.

This will safely allow us to run PTX tests across all CUDA drivers.

Tests/CudaOnly/utils/bin2c_wrapper.cmake

@@ -6,7 +6,7 @@ foreach(obj ${OBJECTS})
   get_filename_component(obj_dir ${obj} DIRECTORY)
 
   if(obj_ext MATCHES ".ptx")
-    set(args --name ${obj_name} ${obj})
+    set(args -p 0x0 --name ${obj_name} ${obj})
     execute_process(COMMAND "${BIN_TO_C_COMMAND}" ${args}
                     WORKING_DIRECTORY ${obj_dir}
                     RESULT_VARIABLE result