makedumpfile: Add erased information in compressed kdump file and ELF formatted dumpfile

[Dave Anderson]

Hi Mahesh,

Now that this feature is in makedumpfile-1.4.0, I presume that you
have crash utility "warning" patches underway?

Also, can you confirm that compressed or kdumps with (or without)
eraseinfo data can still be handled with no problem by the current
version of the crash utility?  I'm not talking about the ramifications
of whatever kernel data may have been erased, but whether the changes to
the dumpfile headers could cause a problem.  I'm presuming that the
compressed kdump eraseinfo data would be invisible to an older version
of crash, and that ELF kdump eraseinfo would just show up as an (unused)
ELF note -- but I just want to make sure. 

Thanks,
  Dave