Update to MySQL 5.6.19, for various fixes described at
https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-19.html
- outfile_loaddata resolved on all archs
- Solaris files not installed, no need to remove
- Simplify multilib install
- Use install's -D option some places
- Add explicit conflict with mariadb-galera-server