roll: third_party/pigweed c8d7e4b..b94252d (2 commits)

b94252d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/300495 pw_grpc: Fix bazel layering check
855e873:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/300494 pw_clock_tree: Fix bazel layering check

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: c8d7e4b3213334..b94252dfbbe500
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8709875852452710881
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I8190aaadae4921ccfa019cd21e2ee7eb48ea9428
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/303732
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: 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 c8d7e4b..b94252d 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c8d7e4b3213334c06c63b8b53aa9b3ecee2ff206
+Subproject commit b94252dfbbe500b2ec18c07389172c97ae78ad1f