[roll third_party/pigweed] SEED-0109: Communication Buffers

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/168357

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 666f31b024a52c8..ddbba2a3dd70f10
Roller-URL: https://ci.chromium.org/b/8767700910600024721
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Icf700f3ad65f7966e3081919790640c09ee9627f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/175271
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 666f31b..ddbba2a 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 666f31b024a52c83b516f7ed8b719ead1c7e8fb0
+Subproject commit ddbba2a3dd70f1059ecc599efce706d60b65e607