fix dir separator in cve-2013-6420 test
Merge branch 'PHP-5.3' into PHP-5.4

* PHP-5.3:
  fix dir separator in cve-2013-6420 test
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  fix dir separator in cve-2013-6420 test
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  fix dir separator in cve-2013-6420 test