Update to v5.11 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.11

Test: Built cuttlefish and flame images. Ran bionic unit tests on both.
Change-Id: Ie60337aafad4bda55af99b6c8fe9f56bf2fa787f
diff --git a/libc/kernel/uapi/linux/if_packet.h b/libc/kernel/uapi/linux/if_packet.h
index db24bbe..e7e7a33 100644
--- a/libc/kernel/uapi/linux/if_packet.h
+++ b/libc/kernel/uapi/linux/if_packet.h
@@ -18,6 +18,7 @@
  ****************************************************************************/
 #ifndef __LINUX_IF_PACKET_H
 #define __LINUX_IF_PACKET_H
+#include <asm/byteorder.h>
 #include <linux/types.h>
 struct sockaddr_pkt {
   unsigned short spkt_family;
@@ -218,6 +219,16 @@
   unsigned short mr_alen;
   unsigned char mr_address[8];
 };
+struct fanout_args {
+#ifdef __LITTLE_ENDIAN_BITFIELD
+  __u16 id;
+  __u16 type_flags;
+#else
+  __u16 type_flags;
+  __u16 id;
+#endif
+  __u32 max_num_members;
+};
 #define PACKET_MR_MULTICAST 0
 #define PACKET_MR_PROMISC 1
 #define PACKET_MR_ALLMULTI 2