Debian packages install broken 'maria' test suite which cannot be run

Debian packages among other things install the following directories:

usr/share/mysql/mysql-test/suite/maria/t

usr/share/mysql/mysql-test/suite/maria/r

But source code does not have them, maria.* files live directly in suite/maria. So, debian packages create empty directories, and MTR chokes on them – it cannot deal with the situation when the t directory exists, but is empty, and does not run the suite at all.