Get rid of assumptions about ".nexe" extension.

tests/ppapi_test_example/nacl.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.
 #
 # This test demonstrates sample usage of ppapi_test_lib.
 #
 # These ppapi_test_lib/ headers should be used by the test setup:
 #   test_interface.h - test interface + setup to be implemented by the tester.
 #   get_browser_interface.h - provides getters for proxy-supported interfaces.
 #
 # ppapi_test_example.cc - sample implementation test_interface.h.
 # ppapi_test_example.html - sample test driver that uses scripting.
 # ppapi_test_example.js   - setup for sample test driver.
 # ppapi_test_example.nmf - sample manifest for platform-specific nexes.
 
 Import('env')
 
 env.Prepend(CPPDEFINES=['XP_UNIX'])
 
-nexe = 'ppapi_test_example_%s.nexe' % env.get('TARGET_FULLARCH')
-env.Alias('ppapi_test_example.nexe', [ '$STAGING_DIR/%s' % nexe ])
+nexe = 'ppapi_test_example_%s' % env.get('TARGET_FULLARCH')
+env.Alias('ppapi_test_example${PROGSUFFIX}',
+          [ '$STAGING_DIR/%s${PROGSUFFIX}' % nexe ])
 
 ppapi_test_example_nexe = env.ComponentProgram(
     nexe,
     [ 'ppapi_test_example.cc' ],
     EXTRA_LIBS=['${PPAPI_LIBS}',
                  'ppapi_test_lib',
                  'platform',  # for CHECK
                  'pthread',
                  'gio',
                  ])
 
 env.Publish(nexe, 'run',
             ['ppapi_test_example.html',
              'ppapi_test_example.nmf',
              'ppapi_test_example.js'])
 
 node = env.PPAPIBrowserTester('ppapi_test_example_browser_test.out',
                               url='ppapi_test_example.html',
                               files=env.ExtractPublishedFiles(nexe),
                               args=['--enable_experimental_js'])
 
 env.AddNodeToTestSuite(node,
                        ['chrome_browser_tests'],
                        'run_ppapi_test_example_browser_test',
                        is_broken=env.PPAPIBrowserTesterIsBroken())