Fix setup in command buffer tests

In the setup of `negative_command_ndrange_kernel_not_support_printf` and
`negative_command_ndrange_kernel_with_enqueue_call`, the program was
being built without having been first created.

Signed-off-by: Gorazd Sumkovski <gorazd.sumkovski@arm.com>

test_conformance/extensions/cl_khr_command_buffer/negative_command_nd_range_kernel.cpp

@@ -298,10 +298,10 @@ __kernel void printf_kernel() {
  }
 )";
 
- error = build_program_create_kernel_helper(context, &program, &kernel,
-  1, &kernel_str,
-   "printf_kernel", nullptr);
- test_error(error, "build_program_create_kernel_helper failed");
+ error =
+ create_single_kernel_helper(context, &program, &kernel, 1,
+ &kernel_str, "printf_kernel", nullptr);
+ test_error(error, "create_single_kernel_helper failed");
 
  return CL_SUCCESS;
  }
@@ -407,10 +407,10 @@ enqueue_kernel(def_q, CLK_ENQUEUE_FLAGS_WAIT_KERNEL, ndrange,
 )";
  std::string build_options = std::string(" ") + cl_std;
 
- error = build_program_create_kernel_helper(
- context, &program, &kernel, 1, &kernel_str, "enqueue_call_kernel",
- build_options.c_str());
- test_error(error, "build_program_create_kernel_helper failed");
+ error = create_single_kernel_helper(context, &program, &kernel, 1,
+   &kernel_str, "enqueue_call_kernel",
+  build_options.c_str());
+ test_error(error, "create_single_kernel_helper failed");
 
  return CL_SUCCESS;
  }