Get rid of assumptions about ".nexe" extension.

tests/srpc_hw/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.
 
 Import('env')
 
 srpc_hw_obj = env.ComponentObject('srpc_hw.o', 'srpc_hw.c')
-srpc_hw_nexe_name = 'srpc_hw_%s.nexe' % env.get('TARGET_FULLARCH')
+srpc_hw_nexe_name = 'srpc_hw_%s' % env.get('TARGET_FULLARCH')
 srpc_hw_nexe = env.ComponentProgram(srpc_hw_nexe_name,
                                     srpc_hw_obj,
                                     EXTRA_LIBS=[
                                         'srpc',
                                         'platform',
                                         'gio',
                                         'imc',
                                         'imc_syscalls',
                                         'pthread',
                                         '${NON_PPAPI_BROWSER_LIBS}'])
 # srpc_hw_undecorated is necessary because srpc_hw_fd.html makes use of
 # __urlAsNaClDesc with a nexe name.
 # TODO(sehr): We can get rid of this hack if we make that API take a manifest
 # file, but it is currently planned for obsoletion also.
-srpc_hw_undecorated = env.ComponentProgram('srpc_hw.nexe',
+srpc_hw_undecorated = env.ComponentProgram('srpc_hw',
                                            srpc_hw_obj,
                                            EXTRA_LIBS=[
                                                'srpc',
                                                'platform',
                                                'gio',
                                                'imc',
                                                'imc_syscalls',
                                                'pthread',
                                                '${NON_PPAPI_BROWSER_LIBS}'])
 
 env.Publish(srpc_hw_nexe_name, 'run',
             ['srpc_hw.html',
              'srpc_hw.nmf',
              'srpc_hw_data.html',
              'srpc_hw_fd.html',
              srpc_hw_undecorated])
 
 env.AddPrebuiltBinaryToRepository(srpc_hw_nexe)
 
 node = env.SelUniversalTest(
     'srpc_hw_test.out',
+    srpc_hw_nexe,
     sel_universal_flags=['--command_file', env.File('srpc_hw_test.stdin')],
-    command=[srpc_hw_nexe],
     stdout_golden=env.File('srpc_hw_test.stdout'),
     )
 env.AddNodeToTestSuite(node,
                        ['small_tests'],
                        'run_srpc_hw_test')
 
 # chrome_browser_tests
 
 node = env.PPAPIBrowserTester(
     'srpc_hw_browser_test.out',
@@ skipping 23 matching lines @@
     'srpc_hw_fd_browser_test.out',
     url='srpc_hw_fd.html',
     files=env.ExtractPublishedFiles(srpc_hw_nexe_name),
     args=['--debug', '--enable_experimental_js'])
 
 env.AddNodeToTestSuite(node,
                        ['chrome_browser_tests'],
                        'run_srpc_hw_fd_chrome_browser_test',
                        is_flaky=True, # Don't subject Chrome to our problems.
                        is_broken=env.PPAPIBrowserTesterIsBroken())