(A-IWDSU+5F51): Changed from A-compU+5F51; unify IWDS1-37280

(A-IWDSU+5F51): Changed from A-compU+5F51; unify IWDS1-37280
[80+372+373].
(UU+5F51): Omit `=>ucs@iwds-1'.
(A-U+5F56-itaiji-003): New abstract node; use `<-denotational' for
A-cgnU+38C7.
(U+5F56-itaiji-003): Use A-U+5F56-itaiji-003 instead of A-cgnU+38C7 as
its mother.
(A-U+38C7-itaiji-009): Likewise.
(A-cgnU+38C8): New abstract node.
(U+38C8): Add `<-denotational' for A-cgnU+38C8.
(A-U+38C8-itaiji-001): New abstract node; use `<-denotational' for
A-cgnU+38C8.
(U+38C8-itaiji-001): Use A-U+38C8-itaiji-001 instead of U+38C8 as its
mother.