Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/include/llvm/CodeGen/LiveRegUnits.h b/linux-x64/clang/include/llvm/CodeGen/LiveRegUnits.h
index 2495459..7dbb2fe 100644
--- a/linux-x64/clang/include/llvm/CodeGen/LiveRegUnits.h
+++ b/linux-x64/clang/include/llvm/CodeGen/LiveRegUnits.h
@@ -1,9 +1,8 @@
 //===- llvm/CodeGen/LiveRegUnits.h - Register Unit Set ----------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -85,14 +84,14 @@
   bool empty() const { return Units.none(); }
 
   /// Adds register units covered by physical register \p Reg.
-  void addReg(unsigned Reg) {
+  void addReg(MCPhysReg Reg) {
     for (MCRegUnitIterator Unit(Reg, TRI); Unit.isValid(); ++Unit)
       Units.set(*Unit);
   }
 
   /// Adds register units covered by physical register \p Reg that are
   /// part of the lanemask \p Mask.
-  void addRegMasked(unsigned Reg, LaneBitmask Mask) {
+  void addRegMasked(MCPhysReg Reg, LaneBitmask Mask) {
     for (MCRegUnitMaskIterator Unit(Reg, TRI); Unit.isValid(); ++Unit) {
       LaneBitmask UnitMask = (*Unit).second;
       if (UnitMask.none() || (UnitMask & Mask).any())
@@ -101,7 +100,7 @@
   }
 
   /// Removes all register units covered by physical register \p Reg.
-  void removeReg(unsigned Reg) {
+  void removeReg(MCPhysReg Reg) {
     for (MCRegUnitIterator Unit(Reg, TRI); Unit.isValid(); ++Unit)
       Units.reset(*Unit);
   }
@@ -115,7 +114,7 @@
   void addRegsInMask(const uint32_t *RegMask);
 
   /// Returns true if no part of physical register \p Reg is live.
-  bool available(unsigned Reg) const {
+  bool available(MCPhysReg Reg) const {
     for (MCRegUnitIterator Unit(Reg, TRI); Unit.isValid(); ++Unit) {
       if (Units.test(*Unit))
         return false;