fix flakey test

scanning the current directory sucks

hphp/test/zend/good/ext-standard-file/bug24482.php

@@ -1,8 +1,8 @@
 <?php
-$globdirs = glob("*", GLOB_ONLYDIR);
+$globdirs = glob(__DIR__."/../../../sample_dir/(", GLOB_ONLYDIR);
 
 $dirs = array();
-$dh = opendir(".");
+$dh = opendir(__DIR__."/../../../sample_dir/");
 while (is_string($file = readdir($dh))) {
 	if ($file[0] === ".") continue;
 	if (!is_dir($file)) continue;

hphp/tools/import_zend_test.py

@@ -535,8 +535,9 @@ def walk(filename, source):
         test = test.replace('tempnam_variation6', 'tempnam_variation5')
     if '/ext-standard-general_functions/bug41445_1.php' in full_dest_filename:
         test = test.replace('bug41445.ini', 'bug41445_1.ini')
-
-
+    if '/ext-standard-file/bug24482.php' in full_dest_filename:
+        test = test.replace('"*"', '__DIR__."/../../../sample_dir/("')
+        test = test.replace('opendir(".")', 'opendir(__DIR__."/../../../sample_dir/")')
 
     file(full_dest_filename, 'w').write(test)