build: Fix GN build for JSON_LAYER_NAME

Author: spencer-lunarg

scripts/gn/generate_vulkan_layers_json.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 # Copyright (C) 2016 The ANGLE Project Authors.
-# Copyright (c) 2022-2023 LunarG, Inc.
+# Copyright (c) 2022-2024 LunarG, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -114,6 +114,7 @@ def main():
              open(json_in_name) as infile:
             for line in infile:
                 line = line.replace('@JSON_LIBRARY_PATH@', relative_path_prefix + layer_lib_name)
+                line = line.replace('@JSON_LAYER_NAME@', 'VK_LAYER_KHRONOS_validation')
                 json_out_file.write(line)
 
 if __name__ == '__main__':