/usr/lib/mysql-testsuite/suite/innodb/include/ is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/mysql-testsuite/suite/innodb/include/checksum_not_strict.inc
/usr/lib/mysql-testsuite/suite/innodb/include/innodb_dict.inc
/usr/lib/mysql-testsuite/suite/innodb/include/innodb_stats.inc
/usr/lib/mysql-testsuite/suite/innodb/include/innodb_stats_table_flag.inc
/usr/lib/mysql-testsuite/suite/innodb/include/innodb_stats_table_flag_analyze.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_innodb_kill_idle_trx_show.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_check.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_cleanup.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_count.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_last_file.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_setup.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_stat.inc
/usr/lib/mysql-testsuite/suite/innodb/include/percona_log_archiving_workload.inc