Update upload.py in depot_tools to infra.git@3d174a0959ba68a4cd83a5abce9f497e30bfce68

Includes fix for bug 388937.

R=agable@chromium.org, jrobbins@chromium.org, maruel@chromium.org
BUG=388937

Review URL: https://codereview.chromium.org/785433003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@293259 0039d316-1c4b-4281-b951-d872f2087c98