Expose the Sign type for shared use

Author: leandrolcampos

libc/shared/sign.h

@@ -0,0 +1,23 @@
+//===-- Shared sign type ----------------------------------------*- 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_SHARED_SIGN_H
+#define LLVM_LIBC_SHARED_SIGN_H
+
+#include "libc_common.h"
+#include "src/__support/sign.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace shared {
+
+using LIBC_NAMESPACE_DECL::Sign;
+
+} // namespace shared
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SHARED_SIGN_H