[wasm] Mask shift counts on architectures that don't implicitly mask.

src/compiler/wasm-compiler.h

Index: src/compiler/wasm-compiler.h
diff --git a/src/compiler/wasm-compiler.h b/src/compiler/wasm-compiler.h
index c40bf82a4a7eab897855eb3152ac9dc601be339b..37c966da116677ef15377108c8b9a9788f71634e 100644
--- a/src/compiler/wasm-compiler.h
+++ b/src/compiler/wasm-compiler.h
@@ -164,6 +164,9 @@ class WasmGraphBuilder {
   Node* MemBuffer(uint32_t offset);
   void BoundsCheckMem(MachineType memtype, Node* index, uint32_t offset);
 
+  Node* MaskShiftCount32(Node* node);
+  Node* MaskShiftCount64(Node* node);
+
   Node* BuildCCall(MachineSignature* sig, Node** args);
   Node* BuildWasmCall(wasm::FunctionSig* sig, Node** args);
   Node* BuildF32Neg(Node* input);