Java 8 support for run/repl-javap-app.check

Just adding the java 8 output.

No attempt to finesse anything.

But the partest mechanism does still need auto-update of these
conditional check files, plus expression evaluation of the condition.
Merge pull request #3818 from som-snytt/issue/repl-javap-app8

Java 8 support for run/repl-javap-app.check