internal: fix escaping of \b in syslog grep
internal: fix escaping of \b in syslog grep

tchaikov/teuthology,t-miyamae/teuthology,ktdreyer/teuthology,caibo2014/teuthology,t-miyamae/teuthology,SUSE/teuthology,dreamhost/teuthology,tchaikov/teuthology,ktdreyer/teuthology,ceph/teuthology,ivotron/teuthology,dreamhost/teuthology,SUSE/teuthology,yghannam/teuthology,ivotron/teuthology,robbat2/teuthology,dmick/teuthology,michaelsevilla/teuthology,SUSE/teuthology,caibo2014/teuthology,ceph/teuthology,michaelsevilla/teuthology,yghannam/teuthology,robbat2/teuthology,dmick/teuthology,dmick/teuthology,zhouyuan/teuthology,zhouyuan/teuthology