roll: third_party/pigweed 4223869..6bfc7bd (3 commits)

6bfc7bd:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/266035 pw_toolchain: Remove invalid glob from Zephyr
1cfec72:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/266136 *: Remove accidental "public/" includes
4d6191a:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/256087 pw_thread_freertos: Thread creation backend

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 4223869df77a3c..6bfc7bd965dda5
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8723537972825352225
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ifc3975fe260e2a0ed2ed0afbb35ee64c70dc0016
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/266313
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 4223869..6bfc7bd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 4223869df77a3c7f7b60fe3f19a1e8ebce4c1223
+Subproject commit 6bfc7bd965dda514bdd8000853c593d8cf9f1601