Tweak timing...can't reproduce locally but pypy on Travis is 'fast' by 0.004s.

greentest/test__core_stat.py

@@ -22,6 +22,7 @@ try:
         f.write('x')
         f.close()
 
+    start = time.time()
     greenlet = gevent.spawn_later(DELAY, write)
     # If we don't specify an interval, we default to zero.
     # libev interprets that as meaning to use its default interval,
@@ -32,8 +33,6 @@ try:
         assert watcher.path == filename
     assert watcher.interval == -1
 
-    start = time.time()
-
     with gevent.Timeout(5 + DELAY + 0.5):
         hub.wait(watcher)