(U-0002634B): Separate IU+2634B; add `sound@ja/on'.

(U-0002634B): Separate IU+2634B; add `sound@ja/on'.
(IU+2634B): Add `<-original' for U+7F8A; add `->mistakable' for
CU+8289, CU+828A and JU+7F8B.
(<CJK RADICAL EWE>): Add `<-denotational' for U-0002634B.
(B-AACB): Separated from JU+7F8B; changed to abstract node to subsume
U+7F8B and U+8288.
(U+7F8B): Add `<-denotational' for B-AACB; add ideographic-structure;
add `sound@ja/on/{kan|go}'.
(JU+7F8B): Separate B-AACB.
(U+8288): Add `<-denotational' for B-AACB; add ideographic-structure;
use `<-simplified@misc' instead of `<-unknown' for JU+7F8B.