Add error logger class for custom table migration.

plugins/woocommerce/src/Database/Migrations/MigrationErrorLogger.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * Error logger for custom table migrations.
+ */
+
+namespace Automattic\WooCommerce\DataBase\Migrations;
+
+/**
+ * Class MigrationErrorLogger.
+ *
+ * Error logging for custom table migrations.
+ *
+ * @package Automattic\WooCommerce\DataBase\Migrations
+ */
+class MigrationErrorLogger extends \WC_Logger {
+
+}