[roll third_party/pigweed] roll: gn

From: git_revision:06cdcc8e1fa8e56f70efb4357d473345b7d1c083
To: git_revision:93ee9b91423c1f1f53fb5f6cba7b8eef6247a564
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/201230
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d7c9aedb4ba94e1..a16cc4c5e5368f0
Roller-URL: https://ci.chromium.org/b/8751907114735487905
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5ff945c8fabb91ec0ff8d62df598fe6c268f6d01
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/201252
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 d7c9aed..a16cc4c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d7c9aedb4ba94e13f421b8fd70b5ded47b3b14ab
+Subproject commit a16cc4c5e5368f088c95dbd730c44f11c683b88a