Add dib-utils project

This is being split off the diskimage-builder project so that things
like dib-run-parts can be used without pulling in all of
diskimage-builder and its dependencies.

Note that I did not enable any unit tests on this project because
currently there aren't any for this code, so those jobs would fail
due to 0 tests run.  I have a spec up to fix this shortcoming.

Change-Id: Id56201ea1ab11e9f64d0db681c4549780fafe0ae
Merge "Add dib-utils project"