Implement optional turbofan UnalignedLoad and UnalignedStore operators

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 85534b071ab8aadf6ac16b93144c33b6997ec2dc..db657c26e040c91f3e8ceaeb993eaf0914c27b17 100644
--- a/src/compiler/wasm-compiler.h
+++ b/src/compiler/wasm-compiler.h
@@ -119,8 +119,9 @@ class WasmGraphBuilder {
   Node* LoadGlobal(uint32_t index);
   Node* StoreGlobal(uint32_t index, Node* val);
   Node* LoadMem(wasm::LocalType type, MachineType memtype, Node* index,
-                uint32_t offset);
-  Node* StoreMem(MachineType type, Node* index, uint32_t offset, Node* val);
+                uint32_t offset, uint32_t alignment);
+  Node* StoreMem(MachineType type, Node* index, uint32_t offset,
+                 uint32_t alignment, Node* val);
 
   static void PrintDebugName(Node* node);