Add tests to ensure libgtpnl + kernel driver work as expected.
Right now a kernel needs to be built from source, using Pablo's tree:
https://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git/
Make sure to enable:
CONFIG_GTP=y
CONFIG_NET_NS=y
CONFIG_VETH=y
$ cp bzImage tests/qemu/_linux
$ ./configure --enable-qemu-tests
$ make
$ make check
Once patches are upstreamed, it will be possible to use a pre-built
kernel from jenkins with: make -C tests qemu-download-kernel
Related: OS#1952
Change-Id: Ibf75514b866fffb11e90529e4705f126b23d7415