misc: SystemC Elastic Trace Player Example.

This patch adds an example configuration for elastic trace playing into the
SystemC world, similar to the already existing traffic generator example in
/util/tlm.

Committed by Jason Lowe-Power <jason@lowepower.com>

util/tlm/README

@@ -94,3 +94,26 @@ The parameter -o specifies the begining of the memory region (0x80000000).
 The system should boot now.
 
 For conveniance a run_gem5.sh file holds all those commands
+
+
+III. Elastic Trace Setup
+========================
+
+Elastic traces can also be replayed into the SystemC world.
+For more information on elastic traces please refer to:
+
+ - http://www.gem5.org/TraceCPU
+
+ - Exploring System Performance using Elastic Traces:
+   Fast, Accurate and Portable
+   R. Jagtap, S. Diestelhorst, A. Hansson, M. Jung, N. Wehn.
+   IEEE International Conference on Embedded Computer Systems Architectures
+   Modeling and Simulation (SAMOS), July, 2016, Samos Island, Greece.
+
+Similar to I. the simulation can be set up with this command:
+
+> ../../build/ARM/gem5.opt ./tlm_elastic.py
+
+Then:
+
+> ./gem5.opt.sc m5out/config.ini