hg: jdk9/sandbox: Add pandoc as requirement for full docs.

[magnus.ihse.bursie at oracle.com]

Changeset: 5a5a66311836
Author:    ihse
Date:      2017-04-11 21:21 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/5a5a66311836

Add pandoc as requirement for full docs.

! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4
! common/conf/jib-profiles.js