Add Hanyo-Denshi/JA and IB code points.

Add Hanyo-Denshi/JA and IB code points.
(U+519D): Use `->denotational' to integrate HD-IB1434.
(JSP-3275): Unify HD-JB1885.
(U+51A2): Use `->denotational' to integrate HD-FT2081.
(JX3-514D): Unify HD-HG3023.
(A-UU+51A4): New character.
(JC3-43F0): Use `<-denotational' for A-UU+51A4 instead of
`<-subsumptive' for G-JX1-514D.
(G-JX1-514D): Unify G-UU+51A4; use A-UU+51A4 instead of U+51A4.