[libunwind] Add missing licenses in test files
NOKEYCHECK=True
GitOrigin-RevId: 282b3eb72372f6a0139923d326b05fc16d86c9fa
diff --git a/test/libunwind_01.pass.cpp b/test/libunwind_01.pass.cpp
index d89f8d1..8b4825a 100644
--- a/test/libunwind_01.pass.cpp
+++ b/test/libunwind_01.pass.cpp
@@ -1,3 +1,12 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
// TODO: Investigate these failures on x86_64 macOS back deployment
// UNSUPPORTED: target=x86_64-apple-darwin{{.+}}