roll: third_party/pigweed: pw_bluetooth_proxy: Release H4 buff on error

These two error cases should never trigger. Regardless,
we should release resources correct.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/229011
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 8bb7ae67e611a10..66015431cb14693
Roller-URL: https://ci.chromium.org/b/8739775056375647345
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2c2b9c422b6919a1f079a5748ea45db21010eb27
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/229112
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: 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 8bb7ae6..6601543 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 8bb7ae67e611a101b22df5d4c458ac6d4fcec11a
+Subproject commit 66015431cb146935b5548d3517cd72ea0e424d74