Improved GMP random functions added in 5.6.2

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335072 c90b9560-bf6c-de11-be94-00142212c4b1
64-bit format codes added in 5.6.2

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335073 c90b9560-bf6c-de11-be94-00142212c4b1