(U+8457): Unify J97-4378.

(U+8457): Unify J97-4378.
(A-JX1-4378): New character.
(J0-4378): Use A-JX1-4378 instead of U+8457 as the value of
`<-denotational'.
(C1-6161): Likewise.
(A-JX1-7B27): New character.
(mother of JX1-7B27): Separate U+FA5F; unify G-M-31410; use A-JX1-7B27
instead of U+8457 as the value of `<-denotational'; separate JX1-7B27.
(JX1-7B27): Unify U+FA5F; use `<-denotational' for A-JX1-7B27 instead
of `->subsumptive' for G-M-31410.
(U+44F4): Use `->denotational' instead of `->subsumptive'.