message: Disable validation by default
diff: #include "vulkanexamplebase.h"
  // Set to "true" to enable Vulkan's validation layers (see vulkandebug.cpp for details)
  -#define ENABLE_VALIDATION true
  +#define ENABLE_VALIDATION false
  // Set to "true" to use staging buffers for uploading vertex and index data to device local memory
  // See "prepareVertices" for details on what's staging and on why to use it
  #define USE_STAGING true
  