Add JSON module graph to dist

Test: m json-module-graph dist nothing
Change-Id: I2a8a89cc5fb767365c9ba92dccc4509c41c6bbb5
diff --git a/ui/build/soong.go b/ui/build/soong.go
index 117a2a5..1b993e1 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -507,6 +507,9 @@
 	if shouldCollectBuildSoongMetrics(config) && ctx.Metrics != nil {
 		ctx.Metrics.SetSoongBuildMetrics(soongBuildMetrics)
 	}
+	if config.JsonModuleGraph() {
+		distGzipFile(ctx, config, config.ModuleGraphFile(), "soong")
+	}
 }
 
 func runMicrofactory(ctx Context, config Config, name string, pkg string, mapping map[string]string) {