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/ruby/Ruby.py

@@ -39,6 +39,8 @@
 #
 # Authors: Brad Beckmann
 
+from __future__ import print_function
+
 import math
 import m5
 from m5.objects import *
@@ -151,7 +153,7 @@ def create_system(options, full_system, system, piobus = None, dma_ports = []):
                                     ruby)"
                   % protocol)
     except:
-        print "Error: could not create sytem for ruby protocol %s" % protocol
+        print("Error: could not create sytem for ruby protocol %s" % protocol)
         raise
 
     # Create the network topology