[perl #131393] [JVM] When reading from stdin, eof is not respected

[via RT]

# New Ticket Created by  Christian Bartolomaeus 
# Please include the string:  [perl #131393]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=131393 >


Currently rakudo on JVM does not respect eof when reading from stdin.

bartolin_     r: .say for lines()
camelia       rakudo-moar 094e77: OUTPUT: «»Wann treffen wir drei wieder 
zusamm?«␤   »Um die siebente Stund‘, am Brückendamm.«␤     »Am Mittelpfeiler.«␤ 
        »Ich lösche die Flamm.«␤ »Ich mit«␤␤ »Ich komme vom Norden her.«␤       
 »Und ich vom Süden.«…»
              ..rakudo-jvm 094e77: OUTPUT: 
«␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤␤…»

For further discussion see 
https://irclog.perlgeek.de/perl6-dev/2017-05-27#i_14645528

I've fudged some tests in roast that were hanging due to this problem
and I'll add this ticket number to the fudge message. Also, I'll
disable S19-command-line/repl.t in t/spectest.data.

Those changes should be reverted, once the problem is solved.