Add support for building and instrumenting Cbench tests with TAU (http://www.cs.uoregon.edu/research/tau/home.php). Most tests work, but some more complicated one (e.g. LAMMPS) don't quite work yet.
The duplication of some code within the tau-xxx sections in make.def is sub-optimal, but it works for now.
See https://apps.sourceforge.net/trac/cbench/wiki/doc/TAUandCbench for information on using TAU and Cbench.