Add diagnostic command VM.info to get hs_err print-out

We print a lot of good information about the system when we print an hs_err file. We should create a diagnostic command VM.info to print the same information without crashing. This information can be used for example when filing a bug to provide basic information about the system

We should skip printing the THREAD information, as that is not interesting in this case. Also, of course, we shouldn't print the header with "A fatal error has been detected...". We still want the full Java version though.