[Core/MD] improved console region auto-detection for a few PAL-only games (The Smurfs Travel the World & Williams Arcade's Greatest Hits)
[Core/VDP] fixed alpha channel for 15-bit (RGB555) and 32-bit (RGB888) color support
[Core/VDP] fixed misaligned buffer writes in Mode 4 when -DALIGN_LONG option is required
[libretro] fixed Android makefile
[Core/VDP] fixed typo
Merge https://github.com/ekeeke/Genesis-Plus-GX