add missing test files

Test/test_files/txt/nok.php

@@ -0,0 +1,7 @@
+<?php
+
+/**
+ * test BOM with umlauts like äöü
+ */
+class IAMNOK {
+}

Test/test_files/txt/ok.php

@@ -0,0 +1,7 @@
+<?php
+
+/**
+ * test BOM with umlauts like äöü
+ */
+class IAMOK {
+}