Fix silly python exception when printing error message.

build/android/gyp/jinja_template.py

 #!/usr/bin/env python
 #
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Renders one or more template files using the Jinja template engine."""
 
 import codecs
 import optparse
@@ skipping 33 matching lines @@
 
 
 def ProcessFiles(env, input_filenames, loader_base_dir, inputs_base_dir,
                  outputs_zip, variables):
   with build_utils.TempDir() as temp_dir:
     for input_filename in input_filenames:
       relpath = os.path.relpath(os.path.abspath(input_filename),
                                 os.path.abspath(inputs_base_dir))
       if relpath.startswith(os.pardir):
         raise Exception('input file %s is not contained in inputs base dir %s'
-                        % input_filename, inputs_base_dir)
+                        % (input_filename, inputs_base_dir))
 
       output_filename = os.path.join(temp_dir, relpath)
       parent_dir = os.path.dirname(output_filename)
       build_utils.MakeDirectory(parent_dir)
       ProcessFile(env, input_filename, loader_base_dir, output_filename,
                   variables)
 
     build_utils.ZipDir(outputs_zip, temp_dir)
 
 
@@ skipping 47 matching lines @@
     ProcessFiles(env, inputs, options.loader_base_dir, options.inputs_base_dir,
                  options.outputs_zip, variables)
 
   if options.depfile:
     deps = loader.get_loaded_templates() + build_utils.GetPythonDependencies()
     build_utils.WriteDepfile(options.depfile, deps)
 
 
 if __name__ == '__main__':
   main()