This is very usable for non Google-sized Goma clusters. We want to use
NINJA_CORE_MULTIPLIER logic, but at the same time we don't want to stall
our cluster with super-high -j values.

Bug: 1323475
Change-Id: I2ed414463b4f397a7bcebe42ea0b996e52006cda
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3632492
Auto-Submit: Aleksey Khoroshilov <akhoroshilov@brave.com>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>