japanese/skk-jisyo: Switch BUILD_DEPENDS from tinycdb to cdb
In commit 1b011c950db74cd4aa9435b9b56b382c1d879162, cdb was changed to
tinycdb because dbskkd-cdb (the only consumer of the cdb version)
depends on tinycdb.
Development of dbskkd-cdb has ended and multiskkserv depends on cdb, so
revert to using cdb.
PR: 296220
Approved by: osa (mentor)