Get rid of assumptions about ".nexe" extension.

tests/math/nacl.scons

 # -*- python -*-
 # Copyright 2010 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')
 
 #--- Version that tests errno conditions
 
-env.StaticObject('float_math', 'float_math.c')
-env.ComponentProgram('float_math.nexe',
-                     'float_math',
-                     EXTRA_LIBS=['m'])
+float_math_obj = env.StaticObject('float_math', 'float_math.c')
+float_math_nexe = env.ComponentProgram('float_math',
+                                       float_math_obj,
+                                       EXTRA_LIBS=['m'])
 node = env.CommandSelLdrTestNacl(
   'float_math.out',
-  command=[env.File('float_math.nexe')],
+  float_math_nexe,
   exit_status='55',
   )
 env.AddNodeToTestSuite(node,
                        ['small_tests'],
                        'run_float_math_test')
 
 #--- Version that uses -fno-math-errno and doesn't test errno conditions
 
 # TODO(jvoung) enable this once we fix linking to handle libm dependencies
 # introduced by lowering (llvm intrinsics -> libm functions).
 # c.f. http://code.google.com/p/nativeclient/issues/detail?id=821
 if env.Bit('bitcode'):
    Return()
 
 noerrno_env = env.Clone()
 noerrno_env.Append(CCFLAGS=['-fno-math-errno'])
 noerrno_env.Append(CPPDEFINES=['NO_ERRNO_CHECK'])
-noerrno_env.StaticObject('float_math_noerrno', 'float_math.c')
-noerrno_env.ComponentProgram('float_math_noerrno.nexe',
-                             'float_math_noerrno',
-                             EXTRA_LIBS=['m'])
+
+float_math_noerrno_obj = noerrno_env.StaticObject('float_math_noerrno',
+                                                  'float_math.c')
+float_math_noerrno_nexe = noerrno_env.ComponentProgram(
+                              'float_math_noerrno',
+                              float_math_noerrno_obj,
+                              EXTRA_LIBS=['m'])
 node = noerrno_env.CommandSelLdrTestNacl(
   'float_math_noerrno.out',
-  command=[noerrno_env.File('float_math_noerrno.nexe')],
+  float_math_noerrno_nexe,
   exit_status='55',
   )
 noerrno_env.AddNodeToTestSuite(node,
                                ['small_tests'],
                               'run_float_math_noerrno_test')