Update to kernel headers v5.2.

Test: Booted a taimen, ran unit bionic unit tests.
Change-Id: I3522c59793bbcef98ea515996a481d92f14b8816
diff --git a/libc/kernel/uapi/linux/if_vlan.h b/libc/kernel/uapi/linux/if_vlan.h
index 27403b6..8ca8900 100644
--- a/libc/kernel/uapi/linux/if_vlan.h
+++ b/libc/kernel/uapi/linux/if_vlan.h
@@ -35,6 +35,7 @@
   VLAN_FLAG_GVRP = 0x2,
   VLAN_FLAG_LOOSE_BINDING = 0x4,
   VLAN_FLAG_MVRP = 0x8,
+  VLAN_FLAG_BRIDGE_BINDING = 0x10,
 };
 enum vlan_name_types {
   VLAN_NAME_TYPE_PLUS_VID,