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I increased ninja -j for buildbot from 50 to 150 in crrev.com/877743
But this increase is not applied to LUCI bot.
Let me enable high build parallelism for LUCI also.

Bug: 731558
Change-Id: Ibd9ece5954142a67a1632b3d4a4a391e4d6f7805
Reviewed-on: https://chromium-review.googlesource.com/954766
Commit-Queue: Takuto Ikuta <tikuta@google.com>
Reviewed-by: Erik Staab <estaab@chromium.org>
Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542003}