[roll third_party/pigweed] pw_tokenizer: Database from JSON

Adds JSON support to the token database creation tool to facilitate
side-band database generation.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/78100

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 1af214dea2172dc..1bf0fb37eb81e4a
Roller-URL: https://ci.chromium.org/b/8824579178857008305
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8824579178857008305
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Idb0b22500fd6180ce8dcc7b9ce267b1a4554be02
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/79660
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 1af214d..1bf0fb3 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 1af214dea2172dccbb43bad6c62f1275e8b29e97
+Subproject commit 1bf0fb37eb81e4a5bf914a8b0f25d8db0dcc0af9