roll: third_party/pigweed 15611b6..b1cf87c (2 commits)

b1cf87c:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/265773 pw_bluetooth: Fix clang-tidy warnings
91408a4:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/265627 pw_bluetooth_sapphire: Add docs for debug symbols

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 15611b68e9527f..b1cf87c286b53f
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8723631731747726961
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I544d4223a49f4a2f3a50e3b4fd51cd4c4b568a5a
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/265852
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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 15611b6..b1cf87c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 15611b68e9527f0f6b414ced9f61289e7455a75c
+Subproject commit b1cf87c286b53f9f7a8a70d78aad945c1556fa5d