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/ip_vs.h b/libc/kernel/uapi/linux/ip_vs.h
index 0230aae..6e3defe 100644
--- a/libc/kernel/uapi/linux/ip_vs.h
+++ b/libc/kernel/uapi/linux/ip_vs.h
@@ -88,8 +88,12 @@
 enum {
   IP_VS_CONN_F_TUNNEL_TYPE_IPIP = 0,
   IP_VS_CONN_F_TUNNEL_TYPE_GUE,
+  IP_VS_CONN_F_TUNNEL_TYPE_GRE,
   IP_VS_CONN_F_TUNNEL_TYPE_MAX,
 };
+#define IP_VS_TUNNEL_ENCAP_FLAG_NOCSUM (0)
+#define IP_VS_TUNNEL_ENCAP_FLAG_CSUM (1 << 0)
+#define IP_VS_TUNNEL_ENCAP_FLAG_REMCSUM (1 << 1)
 struct ip_vs_service_user {
   __u16 protocol;
   __be32 addr;
@@ -243,6 +247,7 @@
   IPVS_DEST_ATTR_STATS64,
   IPVS_DEST_ATTR_TUN_TYPE,
   IPVS_DEST_ATTR_TUN_PORT,
+  IPVS_DEST_ATTR_TUN_FLAGS,
   __IPVS_DEST_ATTR_MAX,
 };
 #define IPVS_DEST_ATTR_MAX (__IPVS_DEST_ATTR_MAX - 1)