Add a mouselock example.

examples/build.scons

 #! -*- python -*-
 #
 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import sys
 
 """
@@ skipping 20 matching lines @@
 * build a target:      ./scons <target>
 * clean a target:      ./scons -c <target>
 
 Supported targets:
   * fullscreen_tumbler Build the fullscreen-tumbler example.
   * geturl             Build the geturl example.
   * hello_world        Build the hello_world example.
   * hello_world_c      Build the hello_world_c example.
   * input_events       Build the input_events example.
   * load_progress      Build the load_progress example.
+  * mouselock          Build the mouselock example.
   * multithreaded_input_events  Build the multithreaded input_events example.
   * pi_generator       Build the pi_generator example.
   * pong               Build the pong example.
   * sine_synth         Build the sine_synth example.
   * tumbler            Build the tumbler example.
 """
 
 example_sconscripts = ['fullscreen_tumbler/build.scons',
                        'geturl/build.scons',
                        'hello_world/build.scons',
                        'hello_world_c/build.scons',
                        'input_events/build.scons',
                        'load_progress/build.scons',
+                       'mouselock/build.scons',
                        'multithreaded_input_events/build.scons',
                        'pi_generator/build.scons',
                        'pong/build.scons',
                        'sine_synth/build.scons',
                        'tumbler/build.scons',
                       ]
 
 Help(HELP_STRING)
 
 staging_dir = os.path.abspath(os.getenv(
     'NACL_INSTALL_ROOT', os.path.join(os.getenv('NACL_SDK_ROOT', '.'),
                                       'staging')))
 general_files = Install(staging_dir, ['httpd.py'])
 general_files.append(InstallAs(os.path.join(staging_dir, 'index.html'),
                                'index_staging.html'))
 
 if sys.platform in ['win32', 'cygwin']:
   general_files.append(Install(staging_dir, 'httpd.cmd'))
 
 SConscript(example_sconscripts)
 
 if not GetOption('clean'):
   Default(['install', general_files])