[roll third_party/pigweed] pw_toolchain_bazel: Add cortex-a32 mcpu value

Original-Bug: 342510882
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/213855
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https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 28a9fb05372696b..9452c6061de3f1a
Roller-URL: https://ci.chromium.org/b/8745933760338292417
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9936bb6f3c82c859994db78a1fae7c61e7d49442
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/214275
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
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diff --git a/third_party/pigweed b/third_party/pigweed
index 28a9fb0..9452c60 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 28a9fb05372696b8a07428acbbd4f583b039fbc4
+Subproject commit 9452c6061de3f1a721e9e12478249fa2d73ddd6b