* build/run_tests.py   (_run_py_test): Flush stdout and stderr before switching their backing      handle. This should fix at least some of the output glitches on the      Windows buildbots.
* build/run_tests.py
  (_run_py_test): Flush stdout and stderr before switching their backing
     handle. This should fix at least some of the output glitches on the
     Windows buildbots.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1034313 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion