databases/tdb1410: Trivial Database for Samba 4.20

TDB is a Trivial Database. In concept, it is very much like GDBM, and
BSD's DB except that it allows multiple simultaneous writers and uses
locking internally to keep writers from trampling on each other. TDB is
also extremely small.

This port is need for the Samba 4.20.

Repo copy of databases/tdb, I will commit update to 1.4.10 in next
commit.

PR: 280533
Sponsored by: Klara, Inc.
Approved by: 0mp (mentor)
Approved by: samba (0mp, kiwi)