Improve copy testing implementation.

- add tests for (unpinned/pinned) x H2H x D2D.
- Free memory at end of test.


[ROCm/hip commit: 134d7975ce]

projects/hip/util/vim/hip.vim

@@ -91,6 +91,7 @@ syn keyword hipFunctionName hipD3D9UnmapResources
 syn keyword hipFunctionName hipD3D9UnregisterResource 
 syn keyword hipFunctionName hipDeviceGetProperties 
 syn keyword hipFunctionName hipDeviceSynchronize 
+syn keyword hipFunctionName hipDeviceReset 
 syn keyword hipFunctionName hipEventCreate 
 syn keyword hipFunctionName hipEventDestroy 
 syn keyword hipFunctionName hipEventElapsedTime