Problem:
 The test innodb.redo_log_archive_04 does

 $ ls -log $IRLA_PATHNAME_1

 to check perms on a file, this is problematic as the ls command
 doesn't have stable output across platforms. An SELinux enabled
 system will include a extra . like this: -r--r--r--. Another example
 is ls in busybox (used by Alpine Linux) which doesn't have the o and
 g options.

Fix:
 Convert get_file_permissions.inc to octal output and use this .inc
 file to convert the test to portable perl.

Change-Id: Ic497f9313022473f7069312db448b4685fa0459e