hg: jdk9/sandbox/jdk: 8173374: Update GenGraphs tool to generate dot graph with requires transitive edges

[chris.hegarty at oracle.com]

Changeset: 3534a97c9244
Author:    mchung
Date:      2017-02-15 16:18 -0800
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/3534a97c9244

8173374: Update GenGraphs tool to generate dot graph with requires transitive edges
Reviewed-by: dfuchs, redestad

! make/CompileModuleTools.gmk
! make/GenerateModuleSummary.gmk
! make/ModuleTools.gmk
! make/src/classes/build/tools/jigsaw/GenGraphs.java
- make/src/classes/build/tools/jigsaw/Graph.java