fix(module-setup): Use dracut_install which aborts on errors.

dracut_install is a wrapper around inst which aborts with error messages
when a source is missing while inst simply returns non-zero. inst let
us get away with building bootengine with missing deps and not noticing.
Merge pull request #7 from marineam/fixinst

fix(module-setup): Use dracut_install which aborts on errors.