pw_trace_tokenized: add trace buffer size GN arg
pw_trace_tokenized: add trace buffer size GN arg

Change-Id: Ia61de1aa4a0d1e188514bd59108432f0cedec39e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/15940
Commit-Queue: Paul Mathieu <8791b1cecbf562cc74a5b7acb099775bda2b56a0@google.com>
Reviewed-by: Keir Mierle <69344103cc60b36d6e1fbdc31ce6504b2286c646@google.com>

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed