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_link.h b/libc/kernel/uapi/linux/if_link.h
index 1b4683e..3db8a4f 100644
--- a/libc/kernel/uapi/linux/if_link.h
+++ b/libc/kernel/uapi/linux/if_link.h
@@ -333,6 +333,8 @@
   IFLA_MACVLAN_MACADDR,
   IFLA_MACVLAN_MACADDR_DATA,
   IFLA_MACVLAN_MACADDR_COUNT,
+  IFLA_MACVLAN_BC_QUEUE_LEN,
+  IFLA_MACVLAN_BC_QUEUE_LEN_USED,
   __IFLA_MACVLAN_MAX,
 };
 #define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)