Add test running support for tests generated as pexes.

tests/mmap/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')
 
 extra_flags = []
 if env.IsRunningUnderValgrind():
   extra_flags.extend(['-E', 'RUNNING_ON_VALGRIND=1'])
@@ skipping 11 matching lines @@
     # '-e' enables exception handling for testing unreadable pages.
     sel_ldr_flags=['-a', '-e'] + extra_flags)
 
 # BUG: http://code.google.com/p/nativeclient/issues/detail?id=2437
 env.AddNodeToTestSuite(node,
                        ['small_tests', 'sel_ldr_tests'],
                        'run_mmap_test',
                        is_broken=env.Bit('target_arm') and env.UsingEmulator())
 
 mmap_atomicity_nexe = env.ComponentProgram(
-    'mmap_atomicity.nexe', 'mmap_atomicity.c',
+    'mmap_atomicity', 'mmap_atomicity.c',
     EXTRA_LIBS=['${PTHREAD_LIBS}', '${NONIRT_LIBS}'])
 node = env.CommandSelLdrTestNacl(
     'mmap_atomicity_test.out', mmap_atomicity_nexe)
 # * Multi-threading is oddly broken under ARM QEMU.  Our test's child
 #   thread never runs.  It appears to be starved by the main thread.
 # * This test is extremely slow on the memcheck bot, which eventually
 #   times out, so it is disabled there.  This may be a consequence of
 #   running under a VM, since running the test on memcheck locally is
 #   fast enough.
 # BUG: http://code.google.com/p/nativeclient/issues/detail?id=2437
 is_broken = ((env.Bit('target_arm') and env.UsingEmulator())
              or env.Bit('running_on_valgrind'))
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_mmap_atomicity_test',
                        is_broken=is_broken)