Use libjs-uglify 2.8.29-3 from sid instead of 3.3.10-1 from experimental
- Bug#891724: rake assets:precompile fails with 'ExecJS::... Pirate Praveen
- Bug#891724: gitlab: Use libjs-uglify from sid Viktar Vauchkevich
- Bug#891724: gitlab: Use libjs-uglify from sid Pirate Praveen
