[roll third_party/pigweed] roll: gn

From: git_revision:4fb095d3f70f624c73bfdd156c5179fad535287d
To: git_revision:b3a0bff47dd81073bfe67a402971bad92e4f2423
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/215091
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 031b9f01df16792..737169c0ecf2742
Roller-URL: https://ci.chromium.org/b/8745572182523791873
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I39a9f7f300467f1a87f9871af2871c36926a3a92
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/215002
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 031b9f0..737169c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 031b9f01df16792439e3e0163cf0b1b537891c2f
+Subproject commit 737169c0ecf27425eb76146f341c13f81336658f