tools/check-licenses/license/allowlists/clang.json

{
    "license": {
        "allowlists": [
            {
                "paths": [
                    "prebuilt\/third_party\/clang\/.*"
                ],
                "patterns": [
                    "llvm_project3.lic",
                    "apache_llvm_full.lic"
                ],
                "notes": []
            }
        ]
    }
}