message: When enabling API validation register khronos validation layer too
diff: @@ -143,6 +143,10 @@ class VulkanHook : LibraryHook
  Process::RegisterEnvironmentModification(
  EnvironmentModification(EnvMod::Append, EnvSep::Platform, "VK_DEVICE_LAYERS",
  "VK_LAYER_LUNARG_standard_validation"));
  + Process::RegisterEnvironmentModification(EnvironmentModification(
  + EnvMod::Append, EnvSep::Platform, "VK_INSTANCE_LAYERS", "VK_LAYER_KHRONOS_validation"));
  + Process::RegisterEnvironmentModification(EnvironmentModification(
  + EnvMod::Append, EnvSep::Platform, "VK_DEVICE_LAYERS", "VK_LAYER_KHRONOS_validation"));
  }
  else
  {
  