Update prebuilt Clang to r416183b from Android.

https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef

clang 12.0.5 (based on r416183b) from build 7284624.

Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/llvm/CodeGen/ScheduleDFS.h b/linux-x64/clang/include/llvm/CodeGen/ScheduleDFS.h
index d60deab..2e0a30c 100644
--- a/linux-x64/clang/include/llvm/CodeGen/ScheduleDFS.h
+++ b/linux-x64/clang/include/llvm/CodeGen/ScheduleDFS.h
@@ -13,7 +13,6 @@
 #ifndef LLVM_CODEGEN_SCHEDULEDFS_H
 #define LLVM_CODEGEN_SCHEDULEDFS_H
 
-#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/CodeGen/ScheduleDAG.h"
 #include <cassert>
@@ -22,6 +21,7 @@
 
 namespace llvm {
 
+template <typename T> class ArrayRef;
 class raw_ostream;
 
 /// Represent the ILP of the subDAG rooted at a DAG node.