N°2651 rollback gitignore for lib tests dirs

Too dangerous ! We'll work properly on this but for 2.8

lib/nikic/php-parser/test/code/parser/stmt/class/final.test

@@ -0,0 +1,17 @@
+Final class
+-----
+<?php
+
+final class A {}
+-----
+array(
+    0: Stmt_Class(
+        flags: MODIFIER_FINAL (32)
+        name: A
+        extends: null
+        implements: array(
+        )
+        stmts: array(
+        )
+    )
+)