remove (optional) architecture string from `uname -r`
remove (optional) architecture string from `uname -r`

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