This adds libxdp as a submodule and link target alongside libbpf. This
should make it just as easy for examples to use libxdp as it currently is
for libbpf. Some hoops need to be jumped through to make libxdp link
against the same version of libbpf as the one we use in this repository.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
We run 'make install' inside the libbpf subdirectory which will mark it as
'dirty' as far as the parent repo is concerned. Since we're not doing any
libbpf development in this repository, just ignoring it should not bring
any issues; we'll still get a notification if the committed content of the
submodule changes.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
