[roll third_party/pigweed] pw_env_setup: Better support for 32-bit ARM hosts

The commonly accepted architecture string for 32-bit ARM hosts is
armv6l, so we now use that when bootstrapping from a 32-bit ARM host.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/58403

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 88cc39c75cffbcd..aed64397a104a14
Roller-URL: https://ci.chromium.org/b/8837702557777052369
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837702557777052369
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I827f91fafaeb2c9c650a6b7a2eaa61c194ffe102
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/58840
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 88cc39c..aed6439 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 88cc39c75cffbcdb2c71468763ed8b44c3837234
+Subproject commit aed64397a104a14072fa8ae8e42caee0e8a4bb60