roll: third_party/pigweed 9e1d364..81786df (2 commits)

81786df:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/300533 pw_rpc_transport: Fix bazel layering check
2b0ac39:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/303832 pw_system: benchmark_runner: Remove unused --config-file arg

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 9e1d364e285ec6..81786df51653f6
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8709758949152474081
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id35865a18f7e65262a9c315b71f21c6d349e8ca0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/304076
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 9e1d364..81786df 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9e1d364e285ec6c475bd8257534625a3d016f93f
+Subproject commit 81786df51653f6b434df8b0ff94cdec64099cce0