roll: third_party/pigweed 3 commits

a7e3e716c1bab31 pw_multibuf: Cast std::distance() to size_t to avo
005ddffe18732af pw_build: Introduce config for enabling -Wshadow-a
dfc2231c5e45b09 docs: Add shortlink for Pigweed Live notes

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e41b65bb2813c26..a7e3e716c1bab31
Roller-URL: https://ci.chromium.org/b/8738512157360642881
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I943c8aa6b46fd821b1e111843a2db6686be107bf
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/232073
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index e41b65b..a7e3e71 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e41b65bb2813c26cecf43ce5053ad1fc3b67010a
+Subproject commit a7e3e716c1bab31544b7ca37804fe7ca52c0f0dc