diplomacy: print out bus widths on edges in agent graph

src/main/scala/groundtest/Generator.scala

@@ -5,6 +5,7 @@ package groundtest
 object Generator extends util.GeneratorApp {
   val longName = names.topModuleProject + "." + names.configs
   generateFirrtl
+  generateGraphML
   generateTestSuiteMakefrags // TODO: Needed only for legacy make targets
   generateParameterDump // TODO: Needed only for legacy make targets
 }