Update prebuilt Clang to match Android kernel.

Bug: 132428451
Change-Id: I8f6e2cb23f381fc0c02ddea99b867e58e925e5be
diff --git a/linux-x64/clang/include/llvm/Support/CodeGen.h b/linux-x64/clang/include/llvm/Support/CodeGen.h
index ce3a623..3175b29 100644
--- a/linux-x64/clang/include/llvm/Support/CodeGen.h
+++ b/linux-x64/clang/include/llvm/Support/CodeGen.h
@@ -1,9 +1,8 @@
 //===-- llvm/Support/CodeGen.h - CodeGen Concepts ---------------*- 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -50,13 +49,18 @@
   // Code generation optimization level.
   namespace CodeGenOpt {
     enum Level {
-      None,        // -O0
-      Less,        // -O1
-      Default,     // -O2, -Os
-      Aggressive   // -O3
+      None = 0,      // -O0
+      Less = 1,      // -O1
+      Default = 2,   // -O2, -Os
+      Aggressive = 3 // -O3
     };
   }
 
+  // Specify effect of frame pointer elimination optimization.
+  namespace FramePointer {
+    enum FP {All, NonLeaf, None};
+  }
+
 }  // end llvm namespace
 
 #endif