run: create missing readfile dir if not present

Author: cirosantilli

run

@@ -96,6 +96,7 @@ def main(args, extra_args=None):
         trace_type = args.trace
 
     if args.gem5:
+        os.makedirs(os.path.dirname(common.gem5_readfile), exist_ok=True)
         with open(common.gem5_readfile, 'w') as readfile:
             readfile.write(args.gem5_readfile)
         memory = '{}B'.format(args.memory)