add additional disassembler platforms for new drc targets
introduce another overlay to SDL, having twice the width while maintaining the original height. This improves the color resolution, since YUV only contains one of the 2 color components per pixel. The stretched overlay has both color components for each display pixel, for a rather modest overhead (nearly none if hardware scaling is available). It's controlled by #if, so it could be excluded on platform where it is technically not available.
Changes: