Try to really fix the slow buildbots this time.

Printing to stdout, doesn't mean the data was actually written.
It depends on the buffering, so we need to flush.  This will hopefully
really fix the buildbots getting killed due to no output on the slow bots.

Lib/test/test_compiler.py

@@ -26,6 +26,7 @@ class CompilerTest(unittest.TestCase):
                     next_time = time.time() + _PRINT_WORKING_MSG_INTERVAL
                     print >>sys.__stdout__, \
                        '  testCompileLibrary still working, be patient...'
+                    sys.__stdout__.flush()
 
                 if not basename.endswith(".py"):
                     continue