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/function/variadicDefaultValue.test

@@ -0,0 +1,27 @@
+Invalid variadic function
+-----
+<?php
+function foo(...$foo = []) {}
+-----
+Variadic parameter cannot have a default value from 2:24 to 2:25
+array(
+    0: Stmt_Function(
+        byRef: false
+        name: foo
+        params: array(
+            0: Param(
+                type: null
+                byRef: false
+                variadic: true
+                name: foo
+                default: Expr_Array(
+                    items: array(
+                    )
+                )
+            )
+        )
+        returnType: null
+        stmts: array(
+        )
+    )
+)