(A-IWDSU+5173): New abstract node.

(A-IWDSU+5173): New abstract node.
(U+5173): Add `<-denotational' for A-IWDSU+5173; add BUCS+95DC as a
target of `<-denotational@usage'; modify structure; preserve the
previous IDS as an apparent structure; add `sound@ja/on'.
(CU+5173): Use `ideographic-structure@apparent' instead of
`ideographic-structure' for the previous structure; add `<-ancient'
and `<-formed' for UU+7B11.
(UU+5173): Use `ideographic-structure@apparent' instead of
`ideographic-structure' for the previous structure; unify
KOSEKI-017070; add `<-simplified@CN' for UU+95DC.