[llvm] [libsycl] Add sycl::queue stub (PR #184110)

[Sergey Semenov via llvm-commits]

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@@ -0,0 +1,33 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file contains the declaration of the SYCL property_list type, which
+/// contains zero or more properties and is used as an optional parameter in
+/// SYCL runtime classes constructors. Each of those properties augments the
+/// semantics of the class with a particular feature.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBSYCL___IMPL_PROPERTY_LIST_HPP
+#define _LIBSYCL___IMPL_PROPERTY_LIST_HPP
+
+_LIBSYCL_BEGIN_NAMESPACE_SYCL
+
+/// Collection of properties for SYCL objects. Supported properties are defined
+/// by exact object the property_list passed to.
----------------
sergey-semenov wrote:

```suggestion
/// by the exact object the property_list is passed to.
```

https://github.com/llvm/llvm-project/pull/184110