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

Add build_utils/cleanDeb.sh which will be called in Jenkins build processes for Ubuntu

dpkg-deb --control *.deb will show:
     DEBIAN/
          -rw-r--r-- 1 netshare users 361 Oct 14 16:28 control
          -rw-r--r-- 1 netshare users  91 Oct 14 16:28 md5sums

Before it is:
     -rw-rw-r-- 1 netshare usersg     356 Sep 16 12:43 control
     -rw-rw-r-- 1 netshare users      91 Sep 16 12:43 md5sums