roll: third_party/pigweed 9c37b72..f66f4e4 (5 commits)

f66f4e4:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/242639 pw_build: Add Python Bazel tests
273ade2:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/242638 pw_presubmit: Add Python Bazel tests
2097d2e:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/242928 pw_protobuf_compiler: Make oneof_callbacks a per-library setting
60572e8:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/242637 pw_env_setup: Add Python Bazel tests
e5db91d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/238432 pw_thread: Migrate to Thread::id

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 9c37b722d9a807..f66f4e473e6620
Roll-Count: 1
Roller-URL: https://ci.chromium.org/b/8733715686527508401
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie5a43205ed899daf00bf4d662622cb87c8e331d9
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/243254
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 9c37b72..f66f4e4 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 9c37b722d9a807222c289069967222166c8613f5
+Subproject commit f66f4e473e6620afb4d027e7f9e224fa67ff2662