[roll third_party/pigweed] roll: go

From: version:2@1.21.6
To: version:2@1.22.0
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/191730
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 9b1e38c0b5cbefc..efa7618928c91da
Roller-URL: https://ci.chromium.org/b/8756296741773263441
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1978bc2e643691c9935e45ffe6994b140a73c214
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/191750
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 9b1e38c..efa7618 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9b1e38c0b5cbefce1f1ceabefbf63a3175b4823f
+Subproject commit efa7618928c91da7f80d42d031ab437e427f1ba2