Add Hanyo-Denshi/JA code points.

Add Hanyo-Denshi/JA code points.
(A-CU+53A9): New character.
(mother of C3-404A): Unify G-CU+53A9; use A-CU+53A9 instead of U+53A9
as the mother.
(C3-404A): Unify CU+53A9.
(mother of JX3-3139): Unify G-J2004U+53A9; use A-CU+53A9 instead of
U+53A9 as the mother.
(mother of G0-3E47): Unify G-UU+53A9; add ideographic-structure.
(JSP-3450): Unify HD-JB2048.