SWDEV-383385 - Add hipStreamSynchronize and free device mem. (#179)

Change-Id: I43e34ae7af80de06224ce331d6ba41d9280a1661

catch/unit/compiler/hipClassKernel.cc

@@ -87,6 +87,8 @@ TEST_CASE("Unit_hipClassKernel_Friend") {
                       0,
                       0,
                       result_ecd);
+  HIP_CHECK(hipStreamSynchronize(nullptr));
+  HIP_CHECK(hipFree(result_ecd));
 }
 
 // check sizeof empty class is 1