[roll third_party/pigweed] roll: gn

From: git_revision:93ee9b91423c1f1f53fb5f6cba7b8eef6247a564
To: git_revision:415b3b19e094cd4b6982147693485df65037f942
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/202230
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 1cbf2352b3e0b5e..7ca22fc66b3aa3c
Roller-URL: https://ci.chromium.org/b/8751280038747082577
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If538f4720cb3cb49bcaca25ce1817165bf9d06b1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/202250
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 1cbf235..7ca22fc 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 1cbf2352b3e0b5ebe7c5f1977985179f30788bad
+Subproject commit 7ca22fc66b3aa3ca6d935a3e27e436a43b0d454f