[HIPIFY][perl][#259] Fix

empty<<<1, 2>>> ( );     >>  hipLaunchKernelGGL(empty, dim3(1), dim3(2), 0, 0);
empty<<<1, 2, 0>>>();    >>
empty<<<1, 2, 0, 0>>>(); >>

instead of erroneous:    >> hipLaunchKernelGGL((empty), dim3(1), dim3(2), 0, 0, );

tests/hipify-clang/unit_tests/samples/axpy.cu

@@ -19,6 +19,8 @@ __global__ void axpy(T a, T *x, T *y) {
   y[threadIdx.x] = a * x[threadIdx.x];
 }
 
+__global__ void empty() {
+}
 
 int main(int argc, char* argv[]) {
   const int kDataLen = 4;
@@ -64,6 +66,15 @@ int main(int argc, char* argv[]) {
   // CHECK: hipLaunchKernelGGL(axpy<float>, dim3(1), dim3(kDataLen), 0, 0, ARG_LIST_AS_MACRO);
   KERNEL_CALL_AS_MACRO(ARG_LIST_AS_MACRO);
 
+  // CHECK: hipLaunchKernelGGL(empty, dim3(1), dim3(kDataLen), 0, 0);
+  empty<<<1, kDataLen>>> ( );
+
+  // CHECK: hipLaunchKernelGGL(empty, dim3(1), dim3(kDataLen), 0, 0);
+  empty<<<1, kDataLen, 0>>>();
+
+  // CHECK: hipLaunchKernelGGL(empty, dim3(1), dim3(kDataLen), 0, 0);
+  empty<<<1, kDataLen, 0, 0>>>();
+
   // CHECK: COMPLETE_LAUNCH;
   COMPLETE_LAUNCH;