[roll third_party/pigweed] pw_sync: Extend CMake support

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/79621

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e858b8187bc5730..6b582970e1b81d2
Roller-URL: https://ci.chromium.org/b/8824491295504722737
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8824491295504722737
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5fb356a11fb7b31f1fdd5b61c1096255b522e192
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/80061
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 e858b81..6b58297 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e858b8187bc57304ed564663aa8408abe903f577
+Subproject commit 6b582970e1b81d2406f360f63365af29f8a39fc6