message: BlueVK: use slog for dlopen error message.
diff: #include <stdio.h>
  #include <stdlib.h>
  +#include <utils/Log.h>
  +
  namespace bluevk {
  static void* module = nullptr;
  @@ -49,8 +51,7 @@ bool loadLibrary() {
  module = dlopen(path, RTLD_NOW | RTLD_LOCAL);
  if (module == nullptr) {
  - printf("Unable to load Vulkan from %s\n", path);
  - fflush(stdout);
  + utils::slog.e << "Unable to load Vulkan from " << path << utils::io::endl;
  }
  return module != nullptr;
  }
  