Update to kernel headers v5.3.2.

Test: Builds and run unit tests on taimen/cuttlefish.
Change-Id: I6ebd8f179d159ac974555e8edca588083e8081b3
diff --git a/libc/kernel/uapi/linux/if_ether.h b/libc/kernel/uapi/linux/if_ether.h
index 9e0b15c..dd2dedb 100644
--- a/libc/kernel/uapi/linux/if_ether.h
+++ b/libc/kernel/uapi/linux/if_ether.h
@@ -72,6 +72,7 @@
 #define ETH_P_802_EX1 0x88B5
 #define ETH_P_PREAUTH 0x88C7
 #define ETH_P_TIPC 0x88CA
+#define ETH_P_LLDP 0x88CC
 #define ETH_P_MACSEC 0x88E5
 #define ETH_P_8021AH 0x88E7
 #define ETH_P_MVRP 0x88F5