Get rid of assumptions about ".nexe" extension.

tests/tls/nacl.scons

 # -*- python -*-
 # Copyright 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')
 
 # Large TLS aligns don't work for newlib.
 if not env.Bit('nacl_glibc'):
   Return()
 
 defines_map = {
     'tdata1' : ['WITH_PTHREAD'],
     'tdata2' : ['MORE_TDATA', 'WITH_PTHREAD'],
     'tbss1' : ['WITH_TBSS', 'WITH_PTHREAD'],
     'tbss2' : ['WITH_TBSS', 'MORE_TBSS', 'WITH_PTHREAD'],
     'tbss3' : ['WITH_TBSS', 'MORE_TDATA', 'WITH_PTHREAD'],
     'largealign' : ['TDATA_LARGE_ALIGN', 'TBSS_LARGE_ALIGN', 'WITH_PTHREAD'],
     'nopthread' : ['WITH_TBSS', 'TDATA_LARGE_ALIGN', 'TBSS_LARGE_ALIGN']}
 for case_name, defines in sorted(defines_map.iteritems()):
   full_name = 'tls_test_' + case_name
   if 'WITH_PTHREAD' in defines:
     libs = ['pthread']
   else:
     libs = []
   env_test = env.Clone()
   env_test.Append(CPPDEFINES=[[define, ''] for define in defines])
   obj = env_test.ComponentObject(full_name + '.o', 'tls.c')
-  prog = env_test.ComponentProgram(full_name + '.nexe', obj, EXTRA_LIBS=libs)
-  node = env_test.CommandSelLdrTestNacl(full_name + '.out', command=[prog],
+  prog = env_test.ComponentProgram(full_name, obj, EXTRA_LIBS=libs)
+  node = env_test.CommandSelLdrTestNacl(full_name + '.out', prog,
                                         size='small')
   env_test.AddNodeToTestSuite(node, ['small_tests'], 'run_' + full_name)