Add some missing `ideographic-structure' properties.

Add some missing `ideographic-structure' properties.
(U+52A6): Don't use BC-8DF6 in the `ideographic-structure' property.
(U+52B1): Use `script' and `<-simplified-ideograph' instead of
`comment'.
(U+52C9): Don't use char-ref format for the operator of the
`ideographic-structure' property.
(C1-6339): Use M-31078 instead of U+83AB in the
`ideographic-structure' property.
(J0-342B): Use `script' and `<-simplified-ideograph' instead of
`comment'.
(C2-4F5C): Use C1-655C instead of U+842C.