[roll third_party/pigweed] pw_file: Add a py_proto_library target

Original-Bug: 265067898
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/126348

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: a9daf080ac96f3d..77adf069787e5e4
Roller-URL: https://ci.chromium.org/b/8792309038289441777
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic08f16c1ee7e0c1cc2a37c5542d8de271f2fe1c1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/126391
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index a9daf08..77adf06 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit a9daf080ac96f3dc7d585afea91e31dc94271144
+Subproject commit 77adf069787e5e4da624350e7f8b0be2f69d413e