BUILD.gn: Disable pool alloc on all translator dependents when fuzzing It contains defines that need to be consistent between the header and the implementation. BUG=angleproject:1522 BUG=chromium:647807 Change-Id: Ica144c455b7366bd9939a07b171edffe5af8bf35 Reviewed-on: https://chromium-review.googlesource.com/386945 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>