config: Switch from the print statement to the print function.

Change-Id: I701fa58cfcfa2767ce9ad24da314a053889878d0
Reviewed-on: https://gem5-review.googlesource.com/8762
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Gabe Black <gabeblack@google.com>

configs/example/read_config.py

@@ -45,6 +45,8 @@
 # between system construction and run control may allow better
 # debugging.
 
+from __future__ import print_function
+
 import argparse
 import ConfigParser
 import inspect
@@ -540,5 +542,4 @@ mgr.find_all_objects()
 m5.instantiate(args.checkpoint_dir)
 
 exit_event = m5.simulate()
-print 'Exiting @ tick %i because %s' % (
-    m5.curTick(), exit_event.getCause())
+print('Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause()))