Refactor LuaJIT codegen to use wasmparser

dev-test/fuzz_targets/luajit_translate.rs

@@ -1,14 +1,12 @@
 #![no_main]
 
-use wasm_smith::Module;
+use wasm_ast::module::Module;
+use wasm_smith::Module as RngModule;
 
 // We are not interested in parity_wasm errors.
-libfuzzer_sys::fuzz_target!(|module: Module| {
+libfuzzer_sys::fuzz_target!(|module: RngModule| {
 	let data = module.to_bytes();
-	let wasm = match parity_wasm::deserialize_buffer(&data) {
-		Ok(v) => v,
-		Err(_) => return,
-	};
+	let wasm = Module::from_data(&data);
 
 	let sink = &mut std::io::sink();