Make test runner more chatty to avoid it getting killed by buildbot.

tools/testrunner/local/pool_unittest.py

 #!/usr/bin/env python
 # Copyright 2014 the V8 project 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 unittest
 
 from pool import Pool
 
 def Run(x):
   if x == 10:
     raise Exception("Expected exception triggered by test.")
   return x
 
 class PoolTest(unittest.TestCase):
   def testNormal(self):
     results = set()
     pool = Pool(3)
     for result in pool.imap_unordered(Run, [[x] for x in range(0, 10)]):
-      results.add(result)
+      results.add(result.value)
     self.assertEquals(set(range(0, 10)), results)
 
   def testException(self):
     results = set()
     pool = Pool(3)
     for result in pool.imap_unordered(Run, [[x] for x in range(0, 12)]):
       # Item 10 will not appear in results due to an internal exception.
-      results.add(result)
+      results.add(result.value)
     expect = set(range(0, 12))
     expect.remove(10)
     self.assertEquals(expect, results)
 
   def testAdd(self):
     results = set()
     pool = Pool(3)
     for result in pool.imap_unordered(Run, [[x] for x in range(0, 10)]):
-      results.add(result)
-      if result < 30:
-        pool.add([result + 20])
+      results.add(result.value)
+      if result.value < 30:
+        pool.add([result.value + 20])
     self.assertEquals(set(range(0, 10) + range(20, 30) + range(40, 50)),
                       results)