Update Makefile.COMMON
Update Makefile.COMMON

jfindley/mysqld_exporter,roman-vynar/mysqld_exporter,roman-vynar/mysqld_exporter,wrouesnel/mysqld_exporter,rtreffer/mysqld_exporter,jmptrader/mysqld_exporter,prometheus/mysqld_exporter,prometheus/mysqld_exporter,growbots/mysqld_exporter