This update for policycoreutils fixes the following issues:

- Reintroduce sandbox package and a couple quality of life improvements (bsc#1266226)
- Remove misleading comment from spec file about reuqires for policycoreutils-devel
- Improve policycoreutils-devel package dependencies (bsc#1236193).
- Change Recommends for policycoreutils-devel to the gui package to Requires.
  This causees some system bloat for people that only want to use
  the config GUI, but prevents errors when building policy packages
- Properly exclude gui.py file (bsc#1242096)
- Added Recommends for policycoreutils-devel to the gui package
- Move gui.py file to gui sub-package to prevent policycoreutil python
  packages from having excessive requirements