The deb package has the wrong revision

[afbjorklund]

Currently we always build major.minor version and then put the third digit into the revision:

DEB_VERSION ?= $(VERSION_MAJOR).$(VERSION_MINOR)-$(VERSION_BUILD)

https://www.debian.org/doc/debian-policy/ch-controlfields.html#s-f-version

The version number of a package. The format is: [epoch:]upstream_version[-debian_revision].

---

This means that we have now built 0.34 twice, once for v0.34.0 and once for v0.34.1:

https://github.com/kubernetes/minikube/releases/download/v0.34.0/minikube_0.34-0.deb

https://github.com/kubernetes/minikube/releases/download/v0.34.1/minikube_0.34-1.deb

We should change this to match our tags/releases (0.34.0, 0.34.1), and drop revision (or 0):

The absence of a debian_revision is equivalent to a debian_revision of 0.

Since we don't build anything but just re-package, we don't need a revision.