hack: Add simple-build.sh
hack: Add simple-build.sh

This implements a simplified build process, which does away with
the requirement to have 'docker buildx' installed. It produces a
single-architecture container image, which is good enough for
local development most of the time.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

kubevirt/libvirt