TrafficGen: Add a basic traffic generator regression

This patch adds a basic regression for the traffic generator. The
regression also serves as an example of the file formats used. More
complex regressions that make use of a DRAM controller model will
follow shortly.

tests/SConscript

@@ -315,7 +315,7 @@ if env['TARGET_ISA'] == 'x86':
 
 configs += ['simple-atomic', 'simple-timing', 'o3-timing', 'memtest',
             'simple-atomic-mp', 'simple-timing-mp', 'o3-timing-mp',
-            'inorder-timing', 'rubytest']
+            'inorder-timing', 'rubytest', 'tgen-simple-mem']
 
 if env['PROTOCOL'] != 'None':
     if env['PROTOCOL'] == 'MI_example':