roll: third_party/pigweed pw_bloat: Fix GN build for size report generation

The size report diff script was incorrectly configured to use a
different script than build.py. This prevented the correct generation of
size reports, leading to aggregation failures.

Original-Bug: 406638041
Test: Build
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/279712
Original-Revision: 4d461ead92fc71f755f30350a6d9d4919daab1fa

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: e078345062efc9..4d461ead92fc71
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8719167605426564161
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I66a60ad8e8b6d5f56eda4d7f82c65ba13a6821d2
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/279952
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 e078345..4d461ea 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e078345062efc9717a9bda19b5c9afac82df2e0a
+Subproject commit 4d461ead92fc71f755f30350a6d9d4919daab1fa