infra: Add Chromium Win Goma RBE ToT builder

Bug: 922354
Change-Id: I0d168efeea407409ab234bdcb1ebf307a9c7b551
Reviewed-on: https://chromium-review.googlesource.com/c/1426248
Reviewed-by: Shinya Kawanaka <shinyak@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Simon Que <sque@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625175}
4 files changed