[roll third_party/pigweed] zephyr: Add native_posix CI

Add CI rule for Zephyr running using --integration (which currently
runs only native_posix platform).

BUG=b/277916020

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/152770

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e8b0a7f5a36dc0e..8e748100f2b1e19
Roller-URL: https://ci.chromium.org/b/8777476036850571729
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Idc2f0c547ad37dbfbafa86ca0cdcc44eb4eb177e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/152970
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 e8b0a7f..8e74810 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e8b0a7f5a36dc0edbbedbdb2941ef42cdf275c11
+Subproject commit 8e748100f2b1e195d052f1e68a537de04da82cbd