Fix upload_dm_results

Also simplify (i.e. remove) the "copy to tmp dir" step.

Bug: skia:
Change-Id: I88a12aeaa1ad131588f66ac306909ec892e5ad18
Reviewed-on: https://skia-review.googlesource.com/148021
Reviewed-by: Stephan Altmueller <stephana@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
6 files changed