Fix builder_name_schema for Upload tasks

Bug: skia:
Change-Id: I5bf9e2e09af1cb7392138c9b871d315588ffbf62
Reviewed-on: https://skia-review.googlesource.com/110241
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
3 files changed