add test

Never shall this happen again

hphp/test/vm/static_closure_params.php

@@ -0,0 +1,12 @@
+<?php
+
+function a() {
+  $b = function ($c) {
+    static $d = 0;
+    var_dump($c + $d++);
+  };
+  $b(10);
+  $b(20);
+  $b(30);
+}
+a();

hphp/test/vm/static_closure_params.php.exp

@@ -0,0 +1,3 @@
+int(10)
+int(21)
+int(32)