TMP: Building firecracker containerd

To be deleted when automated

Cleaning (necessary after firecracker-containerd and firecracker code changes):

make clean # firecracker-containerd components
make firecracker-clean # firecracker and jailer binaries

Building:

make image # only if building from scratch
make firecracker # only if firecracker and jailer binaries changed
make all
sudo make install-firecracker # firecracker and jailer binaries
sudo make install # firecracker-containerd components