Get rid of assumptions about ".nexe" extension.

tests/glibc_static_test/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')
 
 # This is a simple smoke test for using nacl-glibc with static
 # linking.  It is also possible to run *all* the Scons-based tests
 # with static linking using the option nacl_static_link=1.
@@ skipping 16 matching lines @@
 if not env.Bit('nacl_static_link'):
   # Currently nacl-gcc with -static passes [crt* object files]
   # [user object file] [some libs] -lgcc -lgcc_eh [crt* object files] to
   # the linker but the last -lgcc_eh requires -lc.
   env.Append(
       LINKFLAGS=[
           '-static',
           '-T', 'ldscripts/%s.x.static' % GetLinkerScriptBaseName(env),
           '-lc']
       )
-env.ComponentProgram(
-    'glibc_static_hello.nexe',
-    'glibc_static_hello.c')
+nexe = env.ComponentProgram('glibc_static_hello', 'glibc_static_hello.c')
+
 node = env.CommandSelLdrTestNacl(
     'glibc_static_hello.out',
-    command=[env.File('glibc_static_hello.nexe')],
+    nexe,
     stdout_golden=env.File('glibc_static_hello.stdout'),
     glibc_static=True)
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_glibc_static_hello_test')