Since JDK-8184193, JFR file in the JFR streaming repository would keep the most recent data.
It is very useful for postmortem analysis. It would be helpful if hs_err log reports the location of JFR repository.

This enhancement also includes reporting the JFR emergency dump path in hs_err file.

Examples:

* Show JFR repository path:
```
# JFR files might be saved in the repository:
# /tmp/2019_11_01_11_09_30_3529
```

* Show emergency dump path
```
# JFR data is saved as:
# /home/ysuenaga/github/garakuta/NativeSEGV/hs_err_pid3807.jfr
```