Update BF4.def

Fixed XP3 Mapname of Lumphini Garden. Added XP3 ChainLink gamemode
Update BF4.def

Fixed XP3 Mapname of Lumphini Garden. Added XP3 ChainLink gamemode
Update BF4.def

Fixed Chain Link
Update BF4.def

Fixed Date
Merge pull request #149 from EBassie/patch-1

Update BF4.def