[roll third_party/pigweed] roll: go

From: version:2@1.21.3
To: version:2@1.21.4
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/180672
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5eccd87a773568f..ab7234a060e6d93
Roller-URL: https://ci.chromium.org/b/8764541966575193137
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib526e125220f143588d3d79b6d8916dd495cf05f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/180790
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 5eccd87..ab7234a 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5eccd87a773568f5db5f5e7f1dd0809860f3d01e
+Subproject commit ab7234a060e6d93c16a29467ccfe8d97a768b914