roll: third_party/pigweed ef86a47..8fc6081 (3 commits)

8fc6081:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/244952 pw_bluetooth: Introduce L2CAP signaling packets
5b2c426:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/243982 pw_bluetooth_proxy: Add pw_bluetooth_proxy/internal
fc6bb14:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/246235 docs: Update changelog

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: ef86a47f690651..8fc60811d7e2d4
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8732427318714457361
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I6a58a4d31948e54772c7403ef16e0e04fab650cc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/246472
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 ef86a47..8fc6081 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit ef86a47f69065196b3c5ee0a6b2616e4e3bd553a
+Subproject commit 8fc60811d7e2d44a6b08b9af83493cca445cca0e