Re-enable win_angle_x64_dbg_ng as a trybot target. BUG=chromium:585270 Change-Id: I9d95667d676f54bfe8901a428a6cb5eddf927819 Reviewed-on: https://chromium-review.googlesource.com/326830 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>