[fuzzer] Export-wrappers table should be larger

Given ref.func, we might need to wrap any function in the program, as
opposed to imported functions only.

Change-Id: I79942ef2dabf3b6da2d26b49167db6caff53745e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3122160
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76533}

test/fuzzer/wasm-fuzzer-common.cc

@@ -79,7 +79,7 @@ Handle<WasmModuleObject> CompileReferenceModule(Zone* zone, Isolate* isolate,
   Handle<Script> script =
       GetWasmEngine()->GetOrCreateScript(isolate, native_module, kNoSourceUrl);
   Handle<FixedArray> export_wrappers = isolate->factory()->NewFixedArray(
-      static_cast<int>(module->num_exported_functions));
+      static_cast<int>(module->functions.size()));
   return WasmModuleObject::New(isolate, std::move(native_module), script,
                                export_wrappers);
 }