This solves an issue with a non-existing module:
```
$ go mod tidy
[...]
github.com/mitchellh/osext@v0.0.0-20151018003038-5e2d6d41470f: invalid version
```
Signed-off-by: Christophe Fergeau <cfergeau@redhat.com>
Since containers-common package is tied to specific versions
of Podman, add tools to build the package into the contrib directory
This should help other distributions to figure out which commont
package to ship.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
