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/ScheduleDAG.h b/linux-x64/clang/include/llvm/CodeGen/ScheduleDAG.h
index e004f3b..4c8d047 100644
--- a/linux-x64/clang/include/llvm/CodeGen/ScheduleDAG.h
+++ b/linux-x64/clang/include/llvm/CodeGen/ScheduleDAG.h
@@ -724,6 +724,10 @@
   public:
     ScheduleDAGTopologicalSort(std::vector<SUnit> &SUnits, SUnit *ExitSU);
 
+    /// Add a SUnit without predecessors to the end of the topological order. It
+    /// also must be the first new node added to the DAG.
+    void AddSUnitWithoutPredecessors(const SUnit *SU);
+
     /// Creates the initial topological ordering from the DAG to be scheduled.
     void InitDAGTopologicalSorting();