[third_party/pigweed] Roll 2 commits

dcbf65b8a91ddaf pw_tokenizer: Add code size optimization to Rust i
510845caaaa2cdd many: Clean up Python proto imports

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 9c1540d84fb3aa8..dcbf65b8a91ddaf
Roller-URL: https://ci.chromium.org/b/8755249814425732065
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iab07b8de5a24171c183218eb015d0dcabb729add
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/193716
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 9c1540d..dcbf65b 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9c1540d84fb3aa80e140c51b2f58a273cd345fc2
+Subproject commit dcbf65b8a91ddafec6fbfaa16387eb313709159e