[roll third_party/pigweed] zephyr: Allow direct CMake inclusions

When including these libraries without Kconfigs, CMake was throwing an
error. These changes allow adding direct dependencies in CMake.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/175477

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: c83ead5f66e734b..c30e6cfa39b8394
Roller-URL: https://ci.chromium.org/b/8767313956774224913
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I97b99996d1e4fd4536fdbdf80a873bc8752bea13
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/175871
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 c83ead5..c30e6cf 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit c83ead5f66e734b91aeda9d58bfc6113f18ffb60
+Subproject commit c30e6cfa39b839491c583a790f460e4312e28d4e