Update glibc revision

tests/clock/nacl.scons

 # -*- python -*-
 # Copyright (c) 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.
 
 # This is a basic functionality test to exercise the irt plumbing.
 
+import platform
+
 Import('env')
 
 time_check = env.File('${SCONSTRUCT_DIR}/tools/time_check.py')
 
 if env.Bit('tests_use_irt'):
   clock_irt_test_nexe = env.ComponentProgram('clock_irt_test',
                                              'clock_irt_test.c',
                                              EXTRA_LIBS=['${NONIRT_LIBS}'],
                                              )
 
@@ skipping 26 matching lines @@
 node = env.CommandSelLdrTestNacl(
     'clock_get_test.out',
     clock_get_test_nexe,
     wrapper_program_prefix = [
       '${PYTHON}', time_check, '-S',
       '-r',
       '"Realtime\sclock\svalue[^\d]*(\d+\.\d*|\d*\.\d+)"',
       '--'])
 
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_clock_get_test')
+
+clock_test_nexe = env.ComponentProgram('clock_test',
+                                       'clock_test.c',
+                                       EXTRA_LIBS=['${PTHREAD_LIBS}',
+                                                   '${NONIRT_LIBS}'])
+
+# On OSX and Windows, we have observed sleep returning early.  The
+# time_slop_args is used in clock_test to permit some extra slop
+# in the elapsed time (in ms).
+time_slop_args = []
+
+# On Linux the older scheduler implementation did not account properly
+# for the time process spent waiting on the futex in thread join. This
+# affects the CLOCK_PROCESS/THREAD_CPUTIME_ID clock test and we therefore
+# disable this test on older kernels.
+cputime_args = []
+
+if env.Bit('host_windows') or env.Bit('host_mac'):
+  time_slop_args += [ '-s', '10' ]
+elif env.Bit('host_linux'):
+  kernel_version = map(int, platform.release().split('.', 2)[:2])
+  if kernel_version < [3, 0]:
+    cputime_args += [ '-c' ]
+
+node = env.CommandSelLdrTestNacl(
+    'clock_test.out',
+    clock_test_nexe,
+    time_slop_args + cputime_args,
+    size='large')
+
+env.AddNodeToTestSuite(node, ['large_tests'], 'run_clock_test')