Implement WASM big-endian support

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 bd8080b0613367d89c8dd9af8a80107c7ac5c593..528cd87d42ca1eb4edab6ed547b5a7b591285ea9 100644
--- a/src/compiler/wasm-compiler.h
+++ b/src/compiler/wasm-compiler.h
@@ -234,6 +234,9 @@ class WasmGraphBuilder {
   Node* BuildUnalignedStore(MachineType memtype, Node* index, uint32_t offset,
                             uint32_t alignment, Node* val);
 
+  Node* BuildChangeEndianness(Node* node, MachineType type,
+                              wasm::LocalType wasmtype = wasm::kAstStmt);
+
   Node* MaskShiftCount32(Node* node);
   Node* MaskShiftCount64(Node* node);