[roll third_party/pigweed] roll: gn

From: git_revision:f284b6b47039a2d7edfcbfc51f52664f82b5a789
To: git_revision:b0c2742896b6b9f869dc0eb35ae4785cbf2a4512
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/209660
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: f8ccffa43290479..8fefe0c2a5a34c8
Roller-URL: https://ci.chromium.org/b/8748099922525592033
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I4bc6466b34b5418371f33d1c378daf6caae184f7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/209662
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
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 f8ccffa..8fefe0c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit f8ccffa432904792f64cd7a994b3307f026b3a5b
+Subproject commit 8fefe0c2a5a34c83f8095eddf30d36bc4cc01852