games/cataclysm-dda{,-tiles}: Update to 0.G

• Switch to cmake build
• Use flavors to build master/slave ports instead of options: WIP/TODO: remove slave port and do all flavor builds in master port. Looking for a way of run depends -tiles on -curses flavor (like slave port is doing)
• Take maintainership

ChangeLog: https://github.com/CleverRaven/Cataclysm-DDA/releases/tag/0.G