Revert "Remove llvm/MC/MCAsmLayout.h"

This reverts commit 122db8b.

Author: dcci

clang/docs/tools/clang-formatted-files.txt

@@ -5357,6 +5357,7 @@ llvm/include/llvm/MC/MCAsmInfoELF.h
 llvm/include/llvm/MC/MCAsmInfoGOFF.h
 llvm/include/llvm/MC/MCAsmInfoWasm.h
 llvm/include/llvm/MC/MCAsmInfoXCOFF.h
+llvm/include/llvm/MC/MCAsmLayout.h
 llvm/include/llvm/MC/MCCodeView.h
 llvm/include/llvm/MC/MCContext.h
 llvm/include/llvm/MC/MCFixedLenDisassembler.h

llvm/include/llvm/MC/MCAsmLayout.h

@@ -0,0 +1,22 @@
+//===- MCAsmLayout.h - Assembly Layout Object -------------------*- 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_MC_MCASMLAYOUT_H
+#define LLVM_MC_MCASMLAYOUT_H
+
+namespace llvm {
+class MCAssembler;
+
+class MCAsmLayout {
+public:
+  MCAsmLayout(MCAssembler &) {}
+};
+
+} // end namespace llvm
+
+#endif