Add support for XDP meta data when using build skb.

Based on commit 366a88fe ("bpf, ixgbe: add meta data support")
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
Acked-by: NJohn Fastabend <john.fastabend@gmail.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>