Fix module_api sample

[ROCm/clr commit: e434a23be5]

projects/clr/hipamd/samples/0_Intro/module_api/runKernel.cpp

@@ -68,6 +68,7 @@ int main(){
 		uint32_t one = 1;
 
     struct {
+        uint32_t _hidden[6];
         void * _Ad;
         void * _Bd;
     } args;