Inlining PPAPI_LIBS as its now the same everywhere.

ppapi/native_client/tests/ppapi_example_post_message/nacl.scons

 # -*- python -*-
 # Copyright (c) 2012 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.
 
 # This is a Pepper PostMessage example from ppapi/examples/scripting.
 
 Import('env')
 
 env.Prepend(CPPDEFINES=['XP_UNIX'])
 env.Replace(TEST_DIR='${SOURCE_ROOT}/ppapi/native_client/tests/' +
                      'ppapi_example_post_message/')
 
 nexe_name = env.ProgramNameForNmf('ppapi_example_post_message')
 obj = env.ComponentObject(
     'post_message',
     '$SOURCE_ROOT/ppapi/examples/scripting/post_message.cc'
     )
 nexe = env.ComponentProgram(nexe_name, [obj],
-                            EXTRA_LIBS=['${PPAPI_LIBS}', 'ppapi_cpp'])
+                            EXTRA_LIBS=['ppapi', 'ppapi_cpp'])
 
 # Note that the html is required to run this program.
 env.Publish(nexe_name, 'run',
             ['ppapi_example_post_message.html'])
 
 
 test = env.PPAPIBrowserTester(
     'ppapi_example_post_message_test.out',
     url='ppapi_example_post_message.html',
     nmf_names=['ppapi_example_post_message'],
     files=env.ExtractPublishedFiles(nexe_name))
 
 env.AddNodeToTestSuite(test,
                        ['chrome_browser_tests'],
                        'run_ppapi_example_post_message_test',
                        is_broken=env.PPAPIBrowserTesterIsBroken())