/usr/share/dbconfig-common/ is in phpmyadmin 4:4.2.12-2+deb8u2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbconfig-common/data/
/usr/share/dbconfig-common/data/phpmyadmin/
/usr/share/dbconfig-common/data/phpmyadmin/install/
/usr/share/dbconfig-common/data/phpmyadmin/install/mysql
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:3.3.2-2
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:3.4.0-2
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:3.5.6-1
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:4.0.1-1
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:4.1.7-1
/usr/share/dbconfig-common/data/phpmyadmin/upgrade/mysql/4:4.2.0-1