roll: third_party/pigweed 300cd1c..5d9a1e8 (2 commits)

5d9a1e8:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/238554 pw_log: Remove unused macro PW_MODULE_LOG_NAME_DEFINED
77f7b45:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/238318 bazel: Register C++ toolchains for root only

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 300cd1ca16733e..5d9a1e84e7c55a
Roller-URL: https://ci.chromium.org/b/8735580465506810337
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ifc07f488c211a8fb2ca6a6406a60e4cf543791e2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/238636
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 300cd1c..5d9a1e8 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 300cd1ca16733e21346ee06de1fa1a46d301f6d3
+Subproject commit 5d9a1e84e7c55a7b194a8bf459b720cbba220d0c