Fix module_api sample

[ROCm/hip commit: 83adf6525e]

projects/hip/samples/0_Intro/module_api/launchKernelHcc.cpp

@@ -72,6 +72,7 @@ int main(){
 		uint32_t one = 1;
 
     struct {
+        uint32_t _hidden[6];
         void * _Ad;
         void * _Bd;
     } args;