[llvm] Cpu features cross platform (PR #205447)

[Lang Hames via llvm-commits]

================
@@ -1,10 +1,12 @@
+
 //===--- StringExtras.h - Stolen from llvm/ADT/StringExtras.h ---*- 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
 //
-//===---------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
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lhames wrote:

Blank line should be dropped.

https://github.com/llvm/llvm-project/pull/205447