Python 3 compatibility

test/ios/gyptest-app-ios.py

Index: test/ios/gyptest-app-ios.py
diff --git a/test/ios/gyptest-app-ios.py b/test/ios/gyptest-app-ios.py
index f9052549d0bbac325dd4d557d38995ef715288d8..81faa1b0d1e4f68e68fd101da868cd26c1dbd254 100755
--- a/test/ios/gyptest-app-ios.py
+++ b/test/ios/gyptest-app-ios.py
@@ -8,6 +8,8 @@
 Verifies that ios app bundles are built correctly.
 """
 
+from __future__ import print_function
+
 import TestGyp
 
 import subprocess
@@ -17,13 +19,13 @@ def CheckFileXMLPropertyList(file):
   output = subprocess.check_output(['file', file])
   # The double space after XML is intentional.
   if not 'XML  document text' in output:
-    print 'File: Expected XML  document text, got %s' % output
+    print('File: Expected XML  document text, got %s' % output)
     test.fail_test()
 
 def CheckFileBinaryPropertyList(file):
   output = subprocess.check_output(['file', file])
   if not 'Apple binary property list' in output:
-    print 'File: Expected Apple binary property list, got %s' % output
+    print('File: Expected Apple binary property list, got %s' % output)
     test.fail_test()
 
 if sys.platform == 'darwin':