(U+5338): Separate UU+5338; unify o-J0-523E, o-AJ1-04307 and

(U+5338): Separate UU+5338; unify o-J0-523E, o-AJ1-04307 and
o-GT-03427; add U+5338-var-002.
(o-CU+5339): Apply new conventions for glyph granularity.
(U-00020932): Copied from Ideograph-R022-Right-Open-Box.el; add
`ideographic-radical@ucs'.
(A-MJ031671): New abstract node; use `<-denotational' for U-00020932.
(M-02677): Unify MJ031671; add `<-subsumptive' for A-MJ031671.
(KOSEKI-030320): New character; use `<-subsumptive' for A-MJ031671.
(o-IU+20932): New abstract node; use `<-denotational' for U-00020932.
(IU+20932): Copied from Ideograph-R022-Right-Open-Box.el; use
o-IU+20932 as the mother.
(U+3537): Apply new conventions for glyph granularity.