rpm centos: update latest MariaDB 5.5.64
rpm centos: update latest MariaDB 5.5.64

https://gitter.im/groonga/ja?at=5d8aeeb4c77f285fb1db4a3a

Reported by kajiys. Thanks!!!

mroonga/mroonga,mroonga/mroonga,mroonga/mroonga,mroonga/mroonga