(U+5774): Use `->denotational' instead of `->subsumptive'.

(JX2-2467): Unify GT-06313 and GT-K3985.
(GT-K3984): New component of U+5774.
(U+57F6): Use `->denotational' instead of `->subsumptive'.
(U+58A8): Unify J97-4B4F.
(U+FA3A): Add `=>>ucs@unicode'.
(J0-4B4F): Add `=>>ucs@jis'.
(U+58A9): Use `->subsumptive'.