Add Virtual Jaguar project to workspace and experimental build scheme
Fix PS4 Dualshock 4 L2/R2 triggers in Controller-Database. #867

Could use some more investigation as L2/R2 also appear as buttons 7/8 and triggers Rx/Ry
Update 3DO disc detection for a possible rare case

Fixes "Total Eclipse"
Update Higan submodule reference
Update Mednafen submodule
Update Mupen64Plus submodule