[runtime] fix gcc complain on Werror=parentheses

Bug: v8:11675
Change-Id: I8046e61d92b502a8c96f11e3ecfc528544c6ba97
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2843953
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74114}

src/objects/lookup.cc

@@ -1032,8 +1032,8 @@ void LookupIterator::WriteDataValue(Handle<Object> value,
         JSGlobalObject::cast(*holder).global_dictionary(isolate_, kAcquireLoad);
     PropertyCell cell = dictionary.CellAt(isolate_, dictionary_entry());
     DCHECK(cell.value() == *value ||
-           cell.value().IsString() && value->IsString() &&
-               String::cast(cell.value()).Equals(String::cast(*value)));
+           (cell.value().IsString() && value->IsString() &&
+            String::cast(cell.value()).Equals(String::cast(*value))));
 #endif  // DEBUG
   } else {
     DCHECK_IMPLIES(holder->IsJSProxy(isolate_), name()->IsPrivate(isolate_));