add header

Author: nickdesaulniers

libc/src/compiler/__stack_chk_fail.h

@@ -0,0 +1,18 @@
+//===-- Internal header for __stack_chk_fail --------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_COMPILER___STACK_CHK_FAIL_H
+#define LLVM_LIBC_SRC_COMPILER___STACK_CHK_FAIL_H
+
+namespace LIBC_NAMESPACE {
+
+[[noreturn]] void __stack_chk_fail();
+
+} // namespace LIBC_NAMESPACE
+
+#endif // LLVM_LIBC_SRC_COMPILER___STACK_CHK_FAIL_H