cmake: add support for reproducible buildS

cmake: add support for reproducible buildS

We should use relative path not absolute path. We can use target without
breaking reproducibility.

This patch can be removed once MariaDB ships with Mroonga v12.00+ that has
https://github.com/mroonga/mroonga/commit/27caeb9b8ce7fa432b1251eca475b517c6902a6c

Origin: https://github.com/mroonga/mroonga/issues/298#issuecomment-1030815927
Bug: https://github.com/mroonga/mroonga/issues/298
Forwarded: not-needed

Gbp-Pq: Name mroonga-mrn-lib-dirs-path-reproducible-build.patch