Reorder index.yaml.
Reorder index.yaml.

When I committed 4e323876fd432580c8db823a37d0f7769edae46d, the presubmit check
ran and reordered the index.yaml entry that I had manually added. But the commit
that went it was only what has been staged, not the newly reordered index.yaml.
My bad. Fixing order now.

R=csharp@chromium.org
BUG=

Review URL: https://codereview.appspot.com/78290043

luci/luci-py,pombreda/swarming,pombreda/swarming,madecoste/swarming,madecoste/swarming,pombreda/swarming,madecoste/swarming,luci/luci-py,luci/luci-py,madecoste/swarming,pombreda/swarming,luci/luci-py