add implementation of build_pkg.sh
add implementation of build_pkg.sh

DrDaveD/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,MicBrain/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,MicBrain/cvmfs,trshaffer/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,trshaffer/cvmfs,MicBrain/cvmfs,djw8605/cvmfs,reneme/cvmfs,alhowaidi/cvmfsNDN,cvmfs/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,MicBrain/cvmfs,Moliholy/cvmfs,alhowaidi/cvmfsNDN,Gangbiao/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,alhowaidi/cvmfsNDN,alhowaidi/cvmfsNDN,MicBrain/cvmfs,djw8605/cvmfs,Moliholy/cvmfs,alhowaidi/cvmfsNDN,cvmfs/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,reneme/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,DrDaveD/cvmfs,reneme/cvmfs