[GDB] arc-elf32-gdb should also parse coredumps

[shahab-vahedi]

At the moment, only arc-linux-gdb targets are able to parse coredumps. Apparently, there are other usecases as well. Therefore, this feature must be brought to baremetal targets too.

[shahab-vahedi]

I have looked into the code of other targets in GDB and they all seem to have implemented the

*_core_read_descriptions
*_iterate_over_reg_sections

hooks in *-linux-tdep.c file as well. Some did the same in *bsd-tdep.c too, but nothing in *-tdep.c. This is a bit puzzling, since I expect them to fail the same way that arc-elf-gdb did on those coredumps. I have asked a question in the original issue and waiting for an answer.