Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/include/llvm/CodeGen/ReachingDefAnalysis.h b/linux-x64/clang/include/llvm/CodeGen/ReachingDefAnalysis.h
index b21b745..a599fb6 100644
--- a/linux-x64/clang/include/llvm/CodeGen/ReachingDefAnalysis.h
+++ b/linux-x64/clang/include/llvm/CodeGen/ReachingDefAnalysis.h
@@ -1,15 +1,14 @@
 //==--- llvm/CodeGen/ReachingDefAnalysis.h - Reaching Def Analysis -*- 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
 //
 //===----------------------------------------------------------------------===//
 //
 /// \file Reaching Defs Analysis pass.
 ///
-/// This pass tracks for each instruction what is the “closest” reaching def of
+/// This pass tracks for each instruction what is the "closest" reaching def of
 /// a given register. It is used by BreakFalseDeps (for clearance calculation)
 /// and ExecutionDomainFix (for arbitrating conflicting domains).
 ///