[roll third_party/pigweed] pw_env_setup: Retrieve armgcc for ARM Macs

Original-Bug: b/315998985
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/184785

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 67a1b8d9405dd8f..a651ad42aaccc40
Roller-URL: https://ci.chromium.org/b/8761876342732278449
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ia56e0815838d3356a5bef1c0ce45a78dd7d92cb5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/184813
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 67a1b8d..a651ad4 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 67a1b8d9405dd8f3e95d71d385a9a53d3f4b7f51
+Subproject commit a651ad42aaccc40800382e5d272b4f6881500255