[roll third_party/pigweed] pw_build: Add script for copying from CIPD

Original-Bug: 334
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/35163

third_party/pigweed Rolled-Commits: 0464560f53008b6..c411887d874b403
CQ-Do-Not-Cancel-Tryjobs: true
Roller-URL: https://ci.chromium.org/b/8853750626884305024
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8853750626884305024
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9fab253e014b2fea7fe8a6ef9ee9b1f98dac3667
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/35321
Reviewed-by: 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 0464560..c411887 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 0464560f53008b6a04371213da6e07650d4c6e28
+Subproject commit c411887d874b403d7f24ea48de8600b76d2273cc