fix device_jit_traits generation

Author: devsh

src/nbl/device/gen.py

@@ -120,7 +120,7 @@
         args.jit_traits_output_path,
         buildTraitsHeader,
         type="JIT Members",
-        template="oss << \"NBL_CONSTEXPR_STATIC_INLINE {} {} = ({})\" + CJITIncludeLoader::to_string({}.{});",
+        template="oss << \"NBL_CONSTEXPR_STATIC_INLINE {} {} = ({})\" + CJITIncludeLoader::to_string({}.{}) << \";\\n\";",
         limits_json=limits,
         features_json=features,
         format_params=["type", "name", "type", "json_type", "cpp_name"],