fix file with zero size usage in phpize mode
fix default prefix in phpize mode
fix copy the ext dll into the prefix path in phpize mode
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  fix copy the ext dll into the prefix path in phpize mode
  fix default prefix in phpize mode
  fix file with zero size usage in phpize mode
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  fix copy the ext dll into the prefix path in phpize mode
  fix default prefix in phpize mode
  fix file with zero size usage in phpize mode