Update to kernel headers v4.12.3.

Test: Built angler.
Change-Id: Icbcf4fac2334de8409b049ed7a3b4c24b4e98ce9
diff --git a/libc/kernel/uapi/linux/can/netlink.h b/libc/kernel/uapi/linux/can/netlink.h
index e583976..7df626d 100644
--- a/libc/kernel/uapi/linux/can/netlink.h
+++ b/libc/kernel/uapi/linux/can/netlink.h
@@ -88,7 +88,12 @@
   IFLA_CAN_BERR_COUNTER,
   IFLA_CAN_DATA_BITTIMING,
   IFLA_CAN_DATA_BITTIMING_CONST,
+  IFLA_CAN_TERMINATION,
+  IFLA_CAN_TERMINATION_CONST,
+  IFLA_CAN_BITRATE_CONST,
+  IFLA_CAN_DATA_BITRATE_CONST,
   __IFLA_CAN_MAX
 };
 #define IFLA_CAN_MAX (__IFLA_CAN_MAX - 1)
+#define CAN_TERMINATION_DISABLED 0
 #endif