[roll third_party/pigweed] pw_env_setup: Get amd64 protoc on arm64 Macs

Original-Bug: 455
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/58102

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 1c7c83f424871c3..81504c443d5c0f2
Roller-URL: https://ci.chromium.org/b/8837811905453915297
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837811905453915297
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ie62a1b91f42301e54851e7cf8859e8816a0691c6
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/58480
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 1c7c83f..81504c4 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 1c7c83f424871c31c13290fbd6519fcff9d02853
+Subproject commit 81504c443d5c0f2ab88c6ed383dbbd4d757bfe21