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

• adkcon src/od-amiga/amiga-kludges.h:19
• adkconr src/od-amiga/amiga-kludges.h:38
• AllocMem src/od-amiga/sound.c:32
• AllocVec src/od-amiga/ami-win.c:108
• AMIGALIB_NEED_TO_BE_REALLY_SURE src/od-amiga/amiga-kludges.h:26
• aud src/od-amiga/amiga-kludges.h:39