Merge branch 'PHP-5.4' of git.php.net:php-src into PHP-5.4

# By Anatol Belski
# Via Anatol Belski
* 'PHP-5.4' of git.php.net:php-src:
  updated libmagic.patch
Merge branch 'PHP-5.4' of https://git.php.net/repository/php-src into PHP-5.4

# By Pierre Joye
# Via Pierre Joye
* 'PHP-5.4' of https://git.php.net/repository/php-src:
  fix #66872, invalid argument crashes gmp_testbit
  fix #66872, invalid argument crashes gmp_testbit
  add vc12 (2013)
restored the old code in 5.4/5 related to bug #66872

The crash is reproducable in 5.6+ only, so 5.4 and 5.5 are fine
with the old code.
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  restored the old code in 5.4/5 related to bug #66872