(IU+24C1E): Add `sound@ja/on'; unify MJ041343 and HD-KS031790.

(IU+24C1E): Add `sound@ja/on'; unify MJ041343 and HD-KS031790.
(GT-K04289): New character; use `<-subsumptive' for o-IU+24C1E.
(BC-887E): Unify MJ057093, HD-KS031690 and GT-K03005.
(MJ057095): New character; use `<-subsumptive' for BC-887E; unify
HD-KS031760.
(U+24C1E-var-001): New character; use `<-denotational' for U-00024C1E.
(H1-B0A8): Use `<-subsumptive' for U+24C1E-var-001 instead of
`<-denotational' for U-00024C1E.
(o-GT-27936): New abstract node; use `<-denotational' for U-00024C1E.
(U+24C1E-var-006): New character; use `<-denotational' for o-GT-27936.
(MJ041344): New character; use `<-denotational' for o-GT-27936; unify
HD-KS243860, GT-27936, GT-K04290 and M-21745; add `<-formed' for
UU+5351.