v1.0.3 - improve support for SA-1 games

Release Notes

Fixes

• Improve SA-1 support mimicking the Snes9x (mainly on the vblank timming)

How to Try It

1. Copy the core file to the /media/fat/_Console folder.
2. Install the latest Main_MiSTer binary from:
   https://github.com/odelot/Main_MiSTer
3. Edit retroachievements.cfg and enable Hardcore Mode if desired.

Full Changelog: v1.0.2...v1.0.3