ninja: Change the default target from 'build everything' to 'build target "all"'.

pylib/gyp/generator/ninja.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import copy
 import gyp
 import gyp.common
 import gyp.msvs_emulation
 import gyp.MSVSVersion
 import gyp.system_test
@@ skipping 1460 matching lines @@
                          flavor, abs_build_dir=abs_build_dir)
     master_ninja.subninja(output_file)
 
     target = writer.WriteSpec(spec, config_name, generator_flags)
     if target:
       target_outputs[qualified_target] = target
       if qualified_target in all_targets:
         all_outputs.add(target.FinalOutput())
 
   if all_outputs:
+    master_ninja.newline()
     master_ninja.build('all', 'phony', list(all_outputs))
+    master_ninja.default('all')
 
 
 def GenerateOutput(target_list, target_dicts, data, params):
   if params['options'].generator_output:
     raise NotImplementedError, "--generator_output not implemented for ninja"
 
   user_config = params.get('generator_flags', {}).get('config', None)
   if user_config:
     GenerateOutputForConfig(target_list, target_dicts, data, params,
                             user_config)
   else:
     config_names = target_dicts[target_list[0]]['configurations'].keys()
     for config_name in config_names:
       GenerateOutputForConfig(target_list, target_dicts, data, params,
                               config_name)