Add SPDX headers to aoti_shim_cuda.def

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: leofang

cuda_core/cuda/core/_include/aoti_shim_cuda.def

@@ -1,3 +1,6 @@
+; SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+; SPDX-License-Identifier: Apache-2.0
+;
 ; Stub import library for CUDA-specific AOTI symbols (torch_cuda.dll).
 ; See aoti_shim.def for the torch_cpu.dll counterpart.
 LIBRARY torch_cuda.dll