Corpus for wait4:

Coverage	Program
4136	sendmsg$nl_generic-readv-perf_event_open-ioctl$FS_IOC_SETFLAGS-set_mempolicy-syz_80211_join_ibss-syz_open_procfs-syz_open_dev$tty1-perf_event_open-dup2-syz_io_uring_setup-openat$full-write$binfmt_elf64-wait4-ptrace$cont
2335	mlock2-sigaltstack-perf_event_open-sigaltstack-mbind-syz_open_procfs-readv-openat$sr-syz_io_uring_complete-getsockopt$sock_cred-openat$dir-unlinkat-openat-mbind-clone3-wait4-sendmsg$nl_xfrm
1767	perf_event_open-fork-ptrace-ptrace-ptrace$getregset-wait4
1300	seccomp$SECCOMP_SET_MODE_FILTER_LISTENER-fork-ptrace-wait4
1127	perf_event_open-syz_emit_ethernet-ptrace$setopts-fork-wait4-ptrace-wait4
107	fork-wait4
36	wait4