hs_err_pid file summary proposal

[Coleen Phillimore]

I've been working on improvements to the hs_err_pid file.  One 
suggestion was to add a summary because some information is hard to find 
in the file, and is very helpful during triaging.   Realizing that 
everyone has their own opinion of the most important information in the 
hs_err_pid file, the summary information is minimal and additive, and 
represents the information that we generally add to the bug report to 
supplement the hs_err_pid file. Also the stack traces have been moved up 
because that's what my opinion of the most important thing is.

This summary proposal can be found in my last 2 comments in bug:

https://bugs.openjdk.java.net/browse/JDK-8026324

There are some samples in the bug report als.

Please reply with comments.  I have implemented this, but this is not an 
RFR yet.

open webrev at http://cr.openjdk.java.net/~coleenp/8026324.01/

Thanks!
Coleen