[builtins] Migrate Math.clz32 to a TurboFan builtin.

src/compiler/js-builtin-reducer.h

Index: src/compiler/js-builtin-reducer.h
diff --git a/src/compiler/js-builtin-reducer.h b/src/compiler/js-builtin-reducer.h
index 284687cffbb283576dfc7a882bca6748d477412d..dfeb409291a9ba0090dae9e662404874ccf4df2e 100644
--- a/src/compiler/js-builtin-reducer.h
+++ b/src/compiler/js-builtin-reducer.h
@@ -34,6 +34,7 @@ class JSBuiltinReducer final : public AdvancedReducer {
   Reduction ReduceMathMax(Node* node);
   Reduction ReduceMathImul(Node* node);
   Reduction ReduceMathCeil(Node* node);
+  Reduction ReduceMathClz32(Node* node);
   Reduction ReduceMathFloor(Node* node);
   Reduction ReduceMathFround(Node* node);
   Reduction ReduceMathRound(Node* node);