Cleanup on Samples (#295)

- introduced samples/utils functions in namespace vk::su (vulkan sample utils)
- introduced usage of debugReportCallback

samples/03_InitDevice/CMakeLists.txt

@@ -1,4 +1,4 @@
-# Copyright(c) 2018, NVIDIA CORPORATION. All rights reserved.
+# Copyright(c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,10 +17,12 @@ cmake_minimum_required(VERSION 3.2)
 project(03_InitDevice)
 
 set(HEADERS
+  ../utils/utils.hpp
 )
 
 set(SOURCES
   03_InitDevice.cpp
+  ../utils/utils.cpp
 )
 
 source_group(headers FILES ${HEADERS})