Update to v4.19 kernel headers.

Test: Builds and boots.
Change-Id: I99a9ed79666e143b47f02ca4e59eed94f69b7e4a
(cherry picked from commit a981e2e52e2e95a65fa9c9b6fb16dcb4c83dd576)
diff --git a/libc/kernel/uapi/linux/cn_proc.h b/libc/kernel/uapi/linux/cn_proc.h
index 8aa48a8..411b725 100644
--- a/libc/kernel/uapi/linux/cn_proc.h
+++ b/libc/kernel/uapi/linux/cn_proc.h
@@ -82,11 +82,15 @@
     struct coredump_proc_event {
       __kernel_pid_t process_pid;
       __kernel_pid_t process_tgid;
+      __kernel_pid_t parent_pid;
+      __kernel_pid_t parent_tgid;
     } coredump;
     struct exit_proc_event {
       __kernel_pid_t process_pid;
       __kernel_pid_t process_tgid;
       __u32 exit_code, exit_signal;
+      __kernel_pid_t parent_pid;
+      __kernel_pid_t parent_tgid;
     } exit;
   } event_data;
 };