Switch nacl-clang back to gas in SCons

tests/trusted_crash/osx_crash_forwarding/nacl.scons

 # -*- python -*-
 # Copyright 2012 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 tests an interface that is specific to Mac OS X and/or Mach.
 if not env.Bit('host_mac'):
   Return()
 
 # These tests use nexes built by other tests. Nexes do not get staged in
 # pexe mode, so only run this test in nonpexe mode.
 if env.Bit('pnacl_generate_pexe'):
   Return()
 
-# This test uses the nexe built by exception_test, which currently doesn't
-# build with nacl_clang. See
-# https://code.google.com/p/nativeclient/issues/detail?id=3969
-if env.Bit('nacl_clang'):
-  Return()
-
 if 'TRUSTED_ENV' not in env:
   Return()
 trusted_env = env['TRUSTED_ENV']
 
 runner = trusted_env.ComponentProgram(
     'mach_crash_forwarding_test', ['mach_crash_forwarding_test.c'],
     EXTRA_LIBS=['sel'])
 
 def GetNexeByName(name):
   return env.File('${STAGING_DIR}/%s${PROGSUFFIX}' %
@@ skipping 39 matching lines @@
                        declares_exit_status=True)
 env.AddNodeToTestSuite(node, test_suites,
                        'run_mach_unforwarded_trusted_crash_test',
                        is_broken=is_broken)
 
 node = env.CommandTest('mach_forward_early_trusted_crash_test.out',
                        [runner, 'early_trusted'], declares_exit_status=True)
 env.AddNodeToTestSuite(node, test_suites,
                        'run_mach_forward_early_trusted_crash_test',
                        is_broken=is_broken)