Python 3 compatibility

test/standalone/gyptest-standalone.py

Index: test/standalone/gyptest-standalone.py
diff --git a/test/standalone/gyptest-standalone.py b/test/standalone/gyptest-standalone.py
index 87143706ab94cbc2d43095e227a65f9c716c992e..f9a76dc6481241e41c8f3224e44a9d2cbc720c9a 100644
--- a/test/standalone/gyptest-standalone.py
+++ b/test/standalone/gyptest-standalone.py
@@ -9,6 +9,8 @@ Verifies that a project hierarchy created with the --generator-output=
 option can be built even when it's relocated to a different path.
 """
 
+from __future__ import print_function
+
 import TestGyp
 import os
 
@@ -26,7 +28,7 @@ for root, dirs, files in os.walk("."):
     file = os.path.join(root, file)
     contents = open(file).read()
     if 'standalone.gyp' in contents:
-      print 'gyp file referenced in generated output: %s' % file
+      print('gyp file referenced in generated output: %s' % file)
       test.fail_test()