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

[Kseniya Tikhomirova via llvm-commits]

================
@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// 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 definition of an implementation-defined default
+/// async_handler which is invoked when an asynchronous error occurs in a queue
+/// or context that has no user-supplied asynchronous error handler object (see
+/// SYCL 2020 4.13.1.2).
----------------
KseniyaTikhomirova wrote:

https://github.com/llvm/llvm-project/pull/184110/commits/d41b7ffc453281f191977166b31ba6681e8eca72

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