readelf: also dump the address contained in offset on R_386_RELATIVE relocs

[Andrea Monaco]

I see that, when dumping R_386_RELATIVE relocs in readelf, the format is
like this

   Offset     Info    Type            Sym.Value  Sym. Name
  00003d01  00000008 R_386_RELATIVE   


If I understand that type of relocation correctly, another information
is missing: the address contained at the given offset, which ld.so adds
to the load address of the module and then overwrites at the same
offset.

I think it is reasonable to provide that information.  Some users might
need it for debugging or learning purposes.



Thanks,

Andrea Monaco