hg: jdk9/sandbox: 8168772: Convert javadoc generation to build-infra standards

[chris.hegarty at oracle.com]

Changeset: db49e4e492e0
Author:    ihse
Date:      2016-10-26 16:00 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/db49e4e492e0

8168772: Convert javadoc generation to build-infra standards
Reviewed-by: erikj

! common/autoconf/generated-configure.sh
! common/autoconf/spec.gmk.in
! make/Javadoc.gmk
! make/Main.gmk
! make/MainSupport.gmk