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
## JSZip v2.5.0### MIT License<pre>Copyright (c) 2009-2014 Stuart Knightley, David Duponchel, Franz Buchinger, António AfonsoPermission is hereby granted, free of charge, to any person obtaining acopy of this software and associated documentation files (the "Software"),to deal in the Software without restriction, including without limitationthe rights to use, copy, modify, merge, publish, distribute, sublicense,and/or sell copies of the Software, and to permit persons to whom theSoftware is furnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be includedin all copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESSOR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALLTHE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OROTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE.</pre>