Macros starting with `b' in osfmk/kern

• __BeforeRcvCallTrace osfmk/kern/ipc_mig.h:38
• __BeforeRcvRpc osfmk/kern/ipc_mig.h:72
• __BeforeRcvSimple osfmk/kern/ipc_mig.h:89
• __BeforeSimpleCallTrace osfmk/kern/ipc_mig.h:54