HPCC-10201 Downloaded graphcontrol deb is 'of bad quality'

Add build_utils/cleanDeb.sh which will be called in Jenkins build processes for Ubuntu
Merge pull request #149 from xwang2713/HPCC_10201

HPCC-10201 Downloaded graphcontrol deb is 'of bad quality'

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>