TS-2207: CentOS5 out of tree perl module build fails

The older version of automake on CentOS5 doesn't supply the $(builddir)
variable, possibly because it's implicitly the current working
directory. It also doesn't supply various $abs_ variables that later
versions do. Rewrite the copy using more fundamental automake
variables.
TS-2206 The trafficserver RC script does not use absolute path to
traffic_line binary.