hg: jdk9/sandbox: Merge from JDK-8176785-spec-dotfiles-branch

[magnus.ihse.bursie at oracle.com]

Changeset: 0bbf4c6daf9d
Author:    ihse
Date:      2017-04-13 11:06 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/0bbf4c6daf9d

Merge from JDK-8176785-spec-dotfiles-branch

! make/Javadoc.gmk
! make/Main.gmk
! make/common/Modules.gmk