Update to kernel headers v4.12.3.

Test: Built angler.
Change-Id: Icbcf4fac2334de8409b049ed7a3b4c24b4e98ce9
diff --git a/libc/kernel/uapi/linux/netlink_diag.h b/libc/kernel/uapi/linux/netlink_diag.h
index 7a91ee4..afe1521 100644
--- a/libc/kernel/uapi/linux/netlink_diag.h
+++ b/libc/kernel/uapi/linux/netlink_diag.h
@@ -49,6 +49,7 @@
   NETLINK_DIAG_GROUPS,
   NETLINK_DIAG_RX_RING,
   NETLINK_DIAG_TX_RING,
+  NETLINK_DIAG_FLAGS,
   __NETLINK_DIAG_MAX,
 };
 #define NETLINK_DIAG_MAX (__NETLINK_DIAG_MAX - 1)
@@ -56,4 +57,11 @@
 #define NDIAG_SHOW_MEMINFO 0x00000001
 #define NDIAG_SHOW_GROUPS 0x00000002
 #define NDIAG_SHOW_RING_CFG 0x00000004
+#define NDIAG_SHOW_FLAGS 0x00000008
+#define NDIAG_FLAG_CB_RUNNING 0x00000001
+#define NDIAG_FLAG_PKTINFO 0x00000002
+#define NDIAG_FLAG_BROADCAST_ERROR 0x00000004
+#define NDIAG_FLAG_NO_ENOBUFS 0x00000008
+#define NDIAG_FLAG_LISTEN_ALL_NSID 0x00000010
+#define NDIAG_FLAG_CAP_ACK 0x00000020
 #endif