crash information to include Distro information

When resolving bug reports, sometimes is not immediately obvious which distro is in use. Sometimes core dumps are provided, and with the right disto, this is resolvable without further user questioning.

Linux distros have converged on /etc/os-release to communicate the release information in a standard form.

There's sometimes up to 22 lines of information in this file, which is a bit verbose.

Looking at the samples in the following urls, 3 lines appears sufficient to communicate distro and version across a significant set of distros.

• https://github.com/which-distro/os-release
• https://github.com/chef/os_release

So lets include these in the crash handler information.