[roll third_party/pigweed] roll: gn

From: git_revision:eea3906f0e2a8d3622080127d2005ff214d51383
To: git_revision:69ec4fca1fa69ddadae13f9e6b7507efa0675263

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57240
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5f10ff81c5d6f62..6d6154dab886e4b
Roller-URL: https://ci.chromium.org/b/8838789104203699409
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838789104203699409
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1979498f63fb96c5deb9ca5199c96cc1b14b1a58
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57241
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/third_party/pigweed b/third_party/pigweed
index 5f10ff8..6d6154d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5f10ff81c5d6f6262f5c18759d167e3be270fc72
+Subproject commit 6d6154dab886e4b416695d4fc59d7e19146ce663