Update to v4.17.3 kernel headers.

Test: Builds, boots on a walleye.
Change-Id: I389d8b61ec00ea309e38d1b1a2e0dace48c21edb
diff --git a/libc/kernel/uapi/linux/inet_diag.h b/libc/kernel/uapi/linux/inet_diag.h
index 47a3b34..eb9b712 100644
--- a/libc/kernel/uapi/linux/inet_diag.h
+++ b/libc/kernel/uapi/linux/inet_diag.h
@@ -78,6 +78,8 @@
   INET_DIAG_BC_D_COND,
   INET_DIAG_BC_DEV_COND,
   INET_DIAG_BC_MARK_COND,
+  INET_DIAG_BC_S_EQ,
+  INET_DIAG_BC_D_EQ,
 };
 struct inet_diag_hostcond {
   __u8 family;