[Installer] Message Generating deterministic UUIDs

lib/cocoapods/installer.rb

@@ -680,7 +680,9 @@ module Pod
         pods_project.development_pods.remove_from_project if pods_project.development_pods.empty?
         pods_project.sort(:groups_position => :below)
         pods_project.recreate_user_schemes(false)
-        pods_project.predictabilize_uuids if config.deterministic_uuids?
+        if config.deterministic_uuids?
+          UI.message('- Generating deterministic UUIDs') { pods_project.predictabilize_uuids }
+        end
         pods_project.save
       end
     end