Update to v4.19 kernel headers.

Test: Builds and boots.
Change-Id: I99a9ed79666e143b47f02ca4e59eed94f69b7e4a
(cherry picked from commit a981e2e52e2e95a65fa9c9b6fb16dcb4c83dd576)
diff --git a/libc/kernel/uapi/linux/tipc_netlink.h b/libc/kernel/uapi/linux/tipc_netlink.h
index ce77441..911bbde 100644
--- a/libc/kernel/uapi/linux/tipc_netlink.h
+++ b/libc/kernel/uapi/linux/tipc_netlink.h
@@ -92,6 +92,7 @@
   TIPC_NLA_SOCK_TIPC_STATE,
   TIPC_NLA_SOCK_COOKIE,
   TIPC_NLA_SOCK_PAD,
+  TIPC_NLA_SOCK_GROUP,
   __TIPC_NLA_SOCK_MAX,
   TIPC_NLA_SOCK_MAX = __TIPC_NLA_SOCK_MAX - 1
 };
@@ -177,6 +178,16 @@
   TIPC_NLA_MON_PEER_MAX = __TIPC_NLA_MON_PEER_MAX - 1
 };
 enum {
+  TIPC_NLA_SOCK_GROUP_ID,
+  TIPC_NLA_SOCK_GROUP_OPEN,
+  TIPC_NLA_SOCK_GROUP_NODE_SCOPE,
+  TIPC_NLA_SOCK_GROUP_CLUSTER_SCOPE,
+  TIPC_NLA_SOCK_GROUP_INSTANCE,
+  TIPC_NLA_SOCK_GROUP_BC_SEND_NEXT,
+  __TIPC_NLA_SOCK_GROUP_MAX,
+  TIPC_NLA_SOCK_GROUP_MAX = __TIPC_NLA_SOCK_GROUP_MAX - 1
+};
+enum {
   TIPC_NLA_CON_UNSPEC,
   TIPC_NLA_CON_FLAG,
   TIPC_NLA_CON_NODE,
@@ -200,6 +211,7 @@
   TIPC_NLA_PROP_PRIO,
   TIPC_NLA_PROP_TOL,
   TIPC_NLA_PROP_WIN,
+  TIPC_NLA_PROP_MTU,
   __TIPC_NLA_PROP_MAX,
   TIPC_NLA_PROP_MAX = __TIPC_NLA_PROP_MAX - 1
 };