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/Analysis/RegionPass.h b/linux-x64/clang/include/llvm/Analysis/RegionPass.h
index 5b1864a..5c7fa5f 100644
--- a/linux-x64/clang/include/llvm/Analysis/RegionPass.h
+++ b/linux-x64/clang/include/llvm/Analysis/RegionPass.h
@@ -16,15 +16,13 @@
 #define LLVM_ANALYSIS_REGIONPASS_H
 
 #include "llvm/Analysis/RegionInfo.h"
-#include "llvm/IR/Function.h"
 #include "llvm/IR/LegacyPassManagers.h"
 #include "llvm/Pass.h"
 #include <deque>
 
 namespace llvm {
-
-class RGPassManager;
 class Function;
+class RGPassManager;
 
 //===----------------------------------------------------------------------===//
 /// A pass that runs on each Region in a function.
@@ -87,8 +85,6 @@
 /// The pass manager to schedule RegionPasses.
 class RGPassManager : public FunctionPass, public PMDataManager {
   std::deque<Region*> RQ;
-  bool skipThisRegion;
-  bool redoThisRegion;
   RegionInfo *RI;
   Region *CurrentRegion;