Update Atari800 submodule ref
Update Mednafen submodule ref
Update Atari800 submodule ref
Update PPSSPP to v0.9.9
Update VirtualJaguar submodule ref
Support for shaders with LUTs.
Shaders: Add HQx shader.
GameView: Reset pixel store parameters and unbind texture after saving the state texture.

Leaving these parameters in place will result in unexpected behaviour later.
Add updated xBR LV2 multi-pass shaders.
OEMultipassShader: Remove quotes around numbers.
Work around strange CG shader bug.

These lines should actually be equivalent, fixes HQx and xBR shaders.
OEGameView: Lock context while loading LUT textures.