Update to v6.4 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.4

Test: Bionic unit tests pass.
Change-Id: I991f8eaa2b272a464166addb13e6bdc63734444d
diff --git a/libc/kernel/uapi/linux/if_packet.h b/libc/kernel/uapi/linux/if_packet.h
index 719f596..1fe897a 100644
--- a/libc/kernel/uapi/linux/if_packet.h
+++ b/libc/kernel/uapi/linux/if_packet.h
@@ -65,6 +65,7 @@
 #define PACKET_ROLLOVER_STATS 21
 #define PACKET_FANOUT_DATA 22
 #define PACKET_IGNORE_OUTGOING 23
+#define PACKET_VNET_HDR_SZ 24
 #define PACKET_FANOUT_HASH 0
 #define PACKET_FANOUT_LB 1
 #define PACKET_FANOUT_CPU 2