Update mgba-zh_CN.ts
Update mgba-zh_CN.ts

Fully retranslated and re-aligned zh-CN lang file (again, with all strings fixed).
libretro/mgba,mgba-emu/mgba,libretro/mgba,mgba-emu/mgba,Iniquitatis/mgba,Iniquitatis/mgba,libretro/mgba,libretro/mgba,Iniquitatis/mgba,mgba-emu/mgba,libretro/mgba,mgba-emu/mgba,Iniquitatis/mgba