Make checkIncludes work on python 2.7

diff --git a/scripts/maint/checkIncludes.py b/scripts/maint/checkIncludes.py
index 9da15a2b9ca61f48096bc00912ede486c70e68b7..5cf7ead47ec3250ed17890d4d4484f351edcba1e 100755 (executable)
--- a/scripts/maint/checkIncludes.py
+++ b/scripts/maint/checkIncludes.py
@@ -1,6 +1,8 @@
 #!/usr/bin/python3
 # Copyright 2018 The Tor Project, Inc.  See LICENSE file for licensing info.
 
+from __future__ import print_function
+
 import fnmatch
 import os
 import re