hg: jdk/sandbox: Add a pandoc filter for man pages written in javascript, to transform man pages.

[magnus.ihse.bursie at oracle.com]

Changeset: 9221e7c3bf36
Author:    ihse
Date:      2018-10-17 11:41 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/9221e7c3bf36

Add a pandoc filter for man pages written in javascript, to transform man pages.

! make/Docs.gmk
! make/common/ProcessMarkdown.gmk
+ make/scripts/pandoc-manpage-filter.js
+ make/scripts/pandoc-manpage-filter.sh.template