GnGeo for MiyooCFW v20210731 (revision "m1")

IMPROVEMENTS:

This is just a stable release from v20210731 @steward-fu src, recompiled with latest SDK to be compatible with current CFW.

ISSUES:

• when using *.GNO format roms, you can't loadstate after new loadgame.

NOTES:

• default directory for ROMsets and BIOSes is/mnt/roms/NEOGEO/
• provide neogeo.zip or uni-bios.rom BIOS
• this is a compatible build, with static musl libs (works also on uclibc img)
• to install run this IPK pkg from latest gmenu2x's explorer (available in MiyooCFW 2.0)
• to see all changes go to the developer blog-posts on WHYCAN forum