* exp_ch3.adb (Build_Untagged_Equality): Do not set alias of implicit
inequality, it is always rewritten as the negation of the corresponding
equality operation.
* exp_ch8.adb (Expand_N_Subprogram_Renaming): If the subprogram renames
the predefined equality of an untagged record, create a body at the
point of the renaming, to capture the current meaning of equality for
the type.