roll: third_party/pigweed pw_build: Add pw_copy_and_patch_file

Adds the ability to patch a file during both a bazel and GN build

Reland of https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237056

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237056
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/240832
Original-Revision: 7698704f57a69ff5a913f0b2d43d3cc419d10446

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: be439834757b0a..7698704f57a69f
Roller-URL: https://ci.chromium.org/b/8734619828116194097
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I377d3a6529369f1136155150f6c24b9ce9d0615c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/240643
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.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 be43983..7698704 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit be439834757b0abcd0e81a77a0c8c39beca2d4db
+Subproject commit 7698704f57a69ff5a913f0b2d43d3cc419d10446