Defines starting with `s' in src/od-amiga

• SAVE_MEMORY src/od-amiga/memory.h:14
• serdat src/od-amiga/amiga-kludges.h:21
• serdatr src/od-amiga/amiga-kludges.h:100
• serper src/od-amiga/amiga-kludges.h:101
• SOUND16_BASE_VAL src/od-amiga/sound.h:171
• SOUND8_BASE_VAL src/od-amiga/sound.h:172
• spr src/od-amiga/amiga-kludges.h:102
• sprpt src/od-amiga/amiga-kludges.h:103