Increase FD used in php://fd test

Author: nikic

ext/standard/tests/file/php_fd_wrapper_04.phpt

@@ -2,10 +2,10 @@
 php://fd wrapper: invalid file descriptor
 --FILE--
 <?php
-fopen("php://fd/12", "w");
+fopen("php://fd/120", "w");
 
 echo "\nDone.\n";
 --EXPECTF--
-Warning: fopen(php://fd/12): failed to open stream: Error duping file descriptor 12; possibly it doesn't exist: [9]: %s in %s on line %d
+Warning: fopen(php://fd/120): failed to open stream: Error duping file descriptor 120; possibly it doesn't exist: [9]: %s in %s on line %d
 
 Done.