Show path of hs_err_pid file when daemon disappears

[mathjeff]

Expected Behavior

When the Gradle daemon crashes, it would be great if the Gradle client would print the filepath of the hs_pid_file generated by the Gradle daemon (assuming that that file exists).
It would also be nice to print the first ~80 lines of that file too.

Current Behavior

Currently when the Gradle daemon crashes, the Gradle client doesn't mention the existence of an hs_err_pid file to the user.

Context

The AndroidX team has been observing our Gradle daemon to be crashing itermittently : http://issuetracker.google.com/issues/146217083 . Because our crashes occur nearly exclusively on continuous integration servers, we don't see the hs_err_pid files when they are generated (they're created in the working directory from which Gradle was executed, which is a directory that we otherwise wouldn't need to inspect).

However, we found it was super useful to inspect the hs_err_pid file: http://issuetracker.google.com/issues/146217083#comment39 .

If Gradle would display the filepath of the hs_err_pid file, it would be easier for developers to think to look for it and to make sure that the builder copies it into a location where it will be visible after the build completes.

Thanks

[mathjeff]

Thanks for implementing this!