Always set the crash information.

There's no reason to do it only on Windows - and, in fact, the only
platform where we currently do anything with the information is OS X.
Every other program in the Wireshark suite that does it at all does it
on all platforms.

Change-Id: Id1c8d09cac0f4376ba45e2ceb7d63acdfeb2fb57
Reviewed-on: https://code.wireshark.org/review/2732
Reviewed-by: Guy Harris <guy@alum.mit.edu>