SWDEV-364621 - add proper sync to Unit_hipGraphExecMemcpyNodeSetParamsToSymbol_Functional (#177)

Change-Id: I3400d80369a8adb474d582a1b6b5017ac9e90e45

[ROCm/hip-tests commit: f270b6c49a]

projects/hip-tests/catch/unit/graph/hipGraphExecMemcpyNodeSetParamsToSymbol.cc

@@ -282,6 +282,7 @@ void hipGraphExecMemcpyNodeSetParamsToSymbol_GlobalMem(bool useConstVar) {
   }
 
   HIP_CHECK(hipGraphLaunch(graphExec, 0));
+  HIP_CHECK(hipStreamSynchronize(0));
 
   // Validating the result
   for (int i = 0; i < SIZE; i++) {