debian/control: re-add bzip2 to Build-Depends
debian/control: re-add bzip2 to Build-Depends

need *both* Depends and Build-Depends on bzip2

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr