[PATCH V4 2/6] Prepararion for new siginfo on Linux.

[Pedro Alves]

This looks just like the same patch in v3, and my review
comments [1] were not addressed.  As this is recurring, I have to
call it out, sorry -- please make sure to review past review
comments carefully before resubmitting.  If you don't agree to some
review comment and decide to do things differently, reply to
the review saying so.  In any case, it's useful to reply anyway,
saying "I'll fix", or some such, so that there's a feedback loop.

[1] https://sourceware.org/ml/gdb-patches/2016-01/msg00490.html

Thanks,
Pedro Alves