Config: changes to a couple of error msgs

configs/common/Benchmarks.py

@@ -58,9 +58,9 @@ class SysConfig:
         elif buildEnv['TARGET_ISA'] == 'arm':
             return env.get('LINUX_IMAGE', disk('linux-arm-ael.img'))
         else:
-            print "Don't know what default disk image to use for ISA %s" % \
+            print "Don't know what default disk image to use for %s ISA" % \
                 buildEnv['TARGET_ISA']
-            sys.exit(1)
+            exit(1)
 
 # Benchmarks are defined as a key in a dict which is a list of SysConfigs
 # The first defined machine is the test system, the others are driving systems