hg: jdk/sandbox: Start using java classes instead, and remove all references to JJS.

[magnus.ihse.bursie at oracle.com]

Changeset: f15ba6a794a8
Author:    ihse
Date:      2020-06-02 13:54 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/f15ba6a794a8

Start using java classes instead, and remove all references to JJS.

! make/CompileToolsJdk.gmk
! make/autoconf/boot-jdk.m4
! make/autoconf/spec.gmk.in
! make/scripts/pandoc-html-manpage-filter.sh.template
! make/scripts/pandoc-troff-manpage-filter.sh.template