[roll third_party/pigweed] pw_build: Add some missing `license` statements

Original-Bug: b/210876793
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/74482

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 328e409c34d96f3..7e13e366b9c470b
Roller-URL: https://ci.chromium.org/b/8825740609035630657
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8825740609035630657
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Id972eed4cc7f738cb24e038eadfa0a05afe2a0c0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/77380
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 328e409..7e13e36 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 328e409c34d96f311971e8aa2c0e4aa0a5ff5c53
+Subproject commit 7e13e366b9c470bc8e0e939d28369ffe065add0e