hg: javadoc-next/modules/langtools: Added back module graph and dependency methods accidentally removed.

[kumar.x.srinivasan at oracle.com]

Changeset: 045a2c482681
Author:    ksrini
Date:      2016-08-22 21:27 -0700
URL:       http://hg.openjdk.java.net/javadoc-next/modules/langtools/rev/045a2c482681

Added back module graph and dependency methods accidentally removed.

! src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/util/Utils.java