Defines starting with `a' in osfmk/mach

• ACTION_SHIFT osfmk/mach/rpc.h:90
• ALARM_NULL osfmk/mach/mach_types.h:201
• ALERT_ABORT_SAFE osfmk/mach/alert.h:77
• ALERT_ABORT_STRONG osfmk/mach/alert.h:74
• ALERT_BITS osfmk/mach/alert.h:71
• ALERT_USER osfmk/mach/alert.h:80
• ALRMTYPE osfmk/mach/clock_types.h:113
• ALTERNATE_LOAD_SITE osfmk/mach/shared_memory_server.h:60
• AOUT_F osfmk/mach/boot_info.h:228