roll: third_party/pigweed: bazel: Add flag required by ResultStore

Internally, see
https://groups.google.com/a/google.com/g/resultstore-announce/c/qlGd58Sp3vg/m/dgmpm5d_AAAJ
for additional context.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/235394
Docs-Not-Needed: Ted Pudlik <tpudlik@google.com>

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: b0f73feb04effde..382fb9839456b21
Roller-URL: https://ci.chromium.org/b/8736979766310025105
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9d5d59b1e7c3f7380e4f9c70ffa18dea644c6f86
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/235204
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: 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 b0f73fe..382fb98 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b0f73feb04effde3b7751c53c21b7a163f234eb8
+Subproject commit 382fb9839456b2187decb02d6bab8ccba692b8cf