[roll pigweed] roll: go

From: version:2@1.18.4
To: version:2@1.19

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/105381
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 919077e129ebbcf..4c3481a61da6d73
Roller-URL: https://ci.chromium.org/b/8806399122073583633
Cq-Cl-Tag: roller-builder:pigweed-zephyr-roller
Cq-Cl-Tag: roller-bid:8806399122073583633
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1c9e91890be8b83bdefb2f87b9f54ce94b66e94f
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/105386
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/pigweed b/pigweed
index 919077e..4c3481a 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit 919077e129ebbcf6df0047dfa4326973a7bb60a8
+Subproject commit 4c3481a61da6d73c44952cd3975a1ecf682e7988