Add glyph-images of HNG-KAR.

Add glyph-images of HNG-KAR.
(HNG-KAR0358-0): Use U+8879 instead of J2004U+7947 as the mother; omit
`<-formed' for U+8879; use U+7957 instead of U+7947 as the value of
`<-HNG@zinbun/takuhon'.
(J2004U+7947): Add HNG-KAR0262-0.
(U+796D): Unify KOSEKI-276220; add g2-KOSEKI-276220, U+796D-var-001
and HNG-KAR1122-0.
(U+7984): Separate A-UU+7984.
(A-UU+7984): Add `=>ucs@iwds-1'.
(HNG-KAR1124-0): New character; use `<-denotational' for U+7984; use
`<-formed' for U+797F.