8177076: jshell tool: allow non-zero /exit
8190383: JShell API: no way for the jshell tool to report exit status to provider
Reviewed-by: jlahoda
Welcome to OpenJDK!
===================
For information about building OpenJDK, including how to fully retrieve all
source code, please see either of these:
* doc/building.html (html version)
* doc/building.md (markdown version)
See http://openjdk.java.net/ for more information about OpenJDK.