[wasm]implement simd lowering for simple F32x4 and I32x4 unops

src/compiler/simd-scalar-lowering.h

Index: src/compiler/simd-scalar-lowering.h
diff --git a/src/compiler/simd-scalar-lowering.h b/src/compiler/simd-scalar-lowering.h
index c795c6b88bc1b169fc912d70df8f6f567a945d2f..04f9d0ff77ca2dc6f2c4438a31e8ff807a99210b 100644
--- a/src/compiler/simd-scalar-lowering.h
+++ b/src/compiler/simd-scalar-lowering.h
@@ -59,7 +59,8 @@ class SimdScalarLowering {
                    const Operator* load_op);
   void LowerStoreOp(MachineRepresentation rep, Node* node,
                     const Operator* store_op, SimdType rep_type);
-  void LowerBinaryOp(Node* node, SimdType rep_type, const Operator* op);
+  void LowerBinaryOp(Node* node, SimdType input_rep_type, const Operator* op);
+  void LowerUnaryOp(Node* node, SimdType input_rep_type, const Operator* op);
 
   struct NodeState {
     Node* node;