8171385: jshell tool: unresponsive to ctrl-C in input wait on Windows
Summary: Ensuring stop is sent using the proper channel depending on the current state of the StopDetectingInputStream.
Reviewed-by: rfield

8148147: Sync up @modules from jigsaw/jake
Reviewed-by: chegar, mchung

8134254: JShell API/tool: REPL for Java into JDK9
Summary: Adding the implementation of the jshell (read-eval-print-loop) tool.
Reviewed-by: briangoetz, mcimadamore, psandoz, forax
Contributed-by: robert.field@oracle.com, bitterfoxc@gmail.com, jan.lahoda@oracle.com