Update to v5.6 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.6

Add a new method for removing structures. This is to deal with the kernel
headers changing some definitions of timeval to __kernel_old_timeval
and itimerval to __kernel_old_itimerval. Remove the __kernel_old_XX
strutures and change the other structures to the previous definitions.

This only works so long as these structures stay the same, if they
diverge, then a different strategy will need to be implemented.

Test: Booted cuttlefish/walleye.
Test: Ran bionic-unit-tests on cuttlefish/walleye.
Change-Id: I0a61f4fa6e4155c602e0414d9b38c2e1637829af
diff --git a/libc/kernel/uapi/linux/tipc_netlink.h b/libc/kernel/uapi/linux/tipc_netlink.h
index 61577fa..10fdf5e 100644
--- a/libc/kernel/uapi/linux/tipc_netlink.h
+++ b/libc/kernel/uapi/linux/tipc_netlink.h
@@ -46,6 +46,7 @@
   TIPC_NL_UDP_GET_REMOTEIP,
   TIPC_NL_KEY_SET,
   TIPC_NL_KEY_FLUSH,
+  TIPC_NL_ADDR_LEGACY_GET,
   __TIPC_NL_CMD_MAX,
   TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
 };
@@ -135,6 +136,7 @@
   TIPC_NLA_NET_ADDR,
   TIPC_NLA_NET_NODEID,
   TIPC_NLA_NET_NODEID_W1,
+  TIPC_NLA_NET_ADDR_LEGACY,
   __TIPC_NLA_NET_MAX,
   TIPC_NLA_NET_MAX = __TIPC_NLA_NET_MAX - 1
 };