[wasm] Fix the --wasm_code_fuzzer_gen_test again.

test/mjsunit/wasm/wasm-module-builder.js

Index: test/mjsunit/wasm/wasm-module-builder.js
diff --git a/test/mjsunit/wasm/wasm-module-builder.js b/test/mjsunit/wasm/wasm-module-builder.js
index 1e05a52a6504f4d7e3ea4be315d80d951640f53c..68de66bf4a530277a249412e7603a8beac196ea1 100644
--- a/test/mjsunit/wasm/wasm-module-builder.js
+++ b/test/mjsunit/wasm/wasm-module-builder.js
@@ -103,6 +103,11 @@ class WasmFunctionBuilder {
     return this;
   }
 
+  addBodyWithEnd(body) {
+    this.body = body;
+    return this;
+  }
+
   addLocals(locals) {
     this.locals = locals;
     return this;