Don't buffer output in-memory for rietveld server - it logs to stdout by default and can fill the pipe used by subprocess.Popen(), leading to hangs.
Don't buffer output in-memory for rietveld server - it logs to stdout by
default and can fill the pipe used by subprocess.Popen(), leading to
hangs.

Review URL: http://codereview.chromium.org/6684025

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@78084 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools