hg: jdk9/sandbox: Introduce --enable-full-docs.

[magnus.ihse.bursie at oracle.com]

Changeset: d0fd504fc3e1
Author:    ihse
Date:      2017-04-05 11:35 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/d0fd504fc3e1

Introduce --enable-full-docs.

! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4
! common/autoconf/spec.gmk.in
! make/Javadoc.gmk